id sid tid token lemma pos cc08hd78v4b 1 1 two two NUM cc08hd78v4b 1 2 decades decade NOUN cc08hd78v4b 1 3 ago ago ADV cc08hd78v4b 1 4 , , PUNCT cc08hd78v4b 1 5 the the DET cc08hd78v4b 1 6 united united PROPN cc08hd78v4b 1 7 states states PROPN cc08hd78v4b 1 8 issued issue VERB cc08hd78v4b 1 9 the the DET cc08hd78v4b 1 10 first first ADJ cc08hd78v4b 1 11 patent patent NOUN cc08hd78v4b 1 12 claiming claim VERB cc08hd78v4b 1 13 the the DET cc08hd78v4b 1 14 idea idea NOUN cc08hd78v4b 1 15 of of ADP cc08hd78v4b 1 16 an an DET cc08hd78v4b 1 17 automated automate VERB cc08hd78v4b 1 18 iris iris PROPN cc08hd78v4b 1 19 biometrics biometric NOUN cc08hd78v4b 1 20 system system NOUN cc08hd78v4b 1 21 . . PUNCT cc08hd78v4b 2 1 today today NOUN cc08hd78v4b 2 2 , , PUNCT cc08hd78v4b 2 3 multiple multiple ADJ cc08hd78v4b 2 4 companies company NOUN cc08hd78v4b 2 5 offer offer VERB cc08hd78v4b 2 6 commercial commercial ADJ cc08hd78v4b 2 7 biometrics biometric NOUN cc08hd78v4b 2 8 products product NOUN cc08hd78v4b 2 9 . . PUNCT cc08hd78v4b 3 1 however however ADV cc08hd78v4b 3 2 , , PUNCT cc08hd78v4b 3 3 there there PRON cc08hd78v4b 3 4 are be VERB cc08hd78v4b 3 5 still still ADV cc08hd78v4b 3 6 many many ADJ cc08hd78v4b 3 7 unanswered unanswered ADJ cc08hd78v4b 3 8 questions question NOUN cc08hd78v4b 3 9 about about ADP cc08hd78v4b 3 10 the the DET cc08hd78v4b 3 11 workings working NOUN cc08hd78v4b 3 12 of of ADP cc08hd78v4b 3 13 the the DET cc08hd78v4b 3 14 iris iris PROPN cc08hd78v4b 3 15 biometrics biometric NOUN cc08hd78v4b 3 16 algorithms algorithm NOUN cc08hd78v4b 3 17 . . PUNCT cc08hd78v4b 4 1 before before SCONJ cc08hd78v4b 4 2 iris iris PROPN cc08hd78v4b 4 3 recognition recognition PROPN cc08hd78v4b 4 4 systems system NOUN cc08hd78v4b 4 5 are be AUX cc08hd78v4b 4 6 more more ADV cc08hd78v4b 4 7 widely widely ADV cc08hd78v4b 4 8 employed employ VERB cc08hd78v4b 4 9 , , PUNCT cc08hd78v4b 4 10 we we PRON cc08hd78v4b 4 11 must must AUX cc08hd78v4b 4 12 ask ask VERB cc08hd78v4b 4 13 , , PUNCT cc08hd78v4b 4 14 ` ` PUNCT cc08hd78v4b 4 15 ` ` PUNCT cc08hd78v4b 4 16 when when SCONJ cc08hd78v4b 4 17 do do AUX cc08hd78v4b 4 18 these these DET cc08hd78v4b 4 19 algorithms algorithm NOUN cc08hd78v4b 4 20 fail fail VERB cc08hd78v4b 4 21 ? ? PUNCT cc08hd78v4b 4 22 ' ' PUNCT cc08hd78v4b 5 1 previous previous ADJ cc08hd78v4b 5 2 research research NOUN cc08hd78v4b 5 3 has have AUX cc08hd78v4b 5 4 assumed assume VERB cc08hd78v4b 5 5 that that SCONJ cc08hd78v4b 5 6 all all DET cc08hd78v4b 5 7 parts part NOUN cc08hd78v4b 5 8 of of ADP cc08hd78v4b 5 9 an an DET cc08hd78v4b 5 10 iris iris PROPN cc08hd78v4b 5 11 code code NOUN cc08hd78v4b 5 12 are be AUX cc08hd78v4b 5 13 equally equally ADV cc08hd78v4b 5 14 valuable valuable ADJ cc08hd78v4b 5 15 . . PUNCT cc08hd78v4b 6 1 alternatively alternatively ADV cc08hd78v4b 6 2 , , PUNCT cc08hd78v4b 6 3 some some DET cc08hd78v4b 6 4 researchers researcher NOUN cc08hd78v4b 6 5 claim claim VERB cc08hd78v4b 6 6 that that SCONJ cc08hd78v4b 6 7 parts part NOUN cc08hd78v4b 6 8 of of ADP cc08hd78v4b 6 9 the the DET cc08hd78v4b 6 10 iris iris NOUN cc08hd78v4b 6 11 are be AUX cc08hd78v4b 6 12 more more ADV cc08hd78v4b 6 13 valuable valuable ADJ cc08hd78v4b 6 14 , , PUNCT cc08hd78v4b 6 15 but but CCONJ cc08hd78v4b 6 16 they they PRON cc08hd78v4b 6 17 still still ADV cc08hd78v4b 6 18 use use VERB cc08hd78v4b 6 19 the the DET cc08hd78v4b 6 20 same same ADJ cc08hd78v4b 6 21 portions portion NOUN cc08hd78v4b 6 22 of of ADP cc08hd78v4b 6 23 the the DET cc08hd78v4b 6 24 iris iris NOUN cc08hd78v4b 6 25 for for ADP cc08hd78v4b 6 26 all all DET cc08hd78v4b 6 27 subjects subject NOUN cc08hd78v4b 6 28 . . PUNCT cc08hd78v4b 7 1 no no DET cc08hd78v4b 7 2 previous previous ADJ cc08hd78v4b 7 3 researcher researcher NOUN cc08hd78v4b 7 4 has have AUX cc08hd78v4b 7 5 attempted attempt VERB cc08hd78v4b 7 6 to to PART cc08hd78v4b 7 7 experimentally experimentally VERB cc08hd78v4b 7 8 determine determine VERB cc08hd78v4b 7 9 how how SCONJ cc08hd78v4b 7 10 different different ADJ cc08hd78v4b 7 11 parts part NOUN cc08hd78v4b 7 12 of of ADP cc08hd78v4b 7 13 a a DET cc08hd78v4b 7 14 particular particular ADJ cc08hd78v4b 7 15 subject subject NOUN cc08hd78v4b 7 16 's 's PART cc08hd78v4b 7 17 iris iris PROPN cc08hd78v4b 7 18 code code NOUN cc08hd78v4b 7 19 may may AUX cc08hd78v4b 7 20 be be AUX cc08hd78v4b 7 21 more more ADV cc08hd78v4b 7 22 or or CCONJ cc08hd78v4b 7 23 less less ADV cc08hd78v4b 7 24 valuable valuable ADJ cc08hd78v4b 7 25 . . PUNCT cc08hd78v4b 8 1 i i PRON cc08hd78v4b 8 2 obtained obtain VERB cc08hd78v4b 8 3 multiple multiple ADJ cc08hd78v4b 8 4 images image NOUN cc08hd78v4b 8 5 of of ADP cc08hd78v4b 8 6 24 24 NUM cc08hd78v4b 8 7 subjects subject NOUN cc08hd78v4b 8 8 ' ' PART cc08hd78v4b 8 9 eyes eye NOUN cc08hd78v4b 8 10 to to PART cc08hd78v4b 8 11 study study VERB cc08hd78v4b 8 12 the the DET cc08hd78v4b 8 13 reliability reliability NOUN cc08hd78v4b 8 14 of of ADP cc08hd78v4b 8 15 individual individual ADJ cc08hd78v4b 8 16 bits bit NOUN cc08hd78v4b 8 17 in in ADP cc08hd78v4b 8 18 the the DET cc08hd78v4b 8 19 iris iris PROPN cc08hd78v4b 8 20 codes code NOUN cc08hd78v4b 8 21 . . PUNCT cc08hd78v4b 9 1 i i PRON cc08hd78v4b 9 2 develop develop VERB cc08hd78v4b 9 3 a a DET cc08hd78v4b 9 4 theoretical theoretical ADJ cc08hd78v4b 9 5 explanation explanation NOUN cc08hd78v4b 9 6 of of ADP cc08hd78v4b 9 7 the the DET cc08hd78v4b 9 8 sources source NOUN cc08hd78v4b 9 9 of of ADP cc08hd78v4b 9 10 inconsistencies inconsistency NOUN cc08hd78v4b 9 11 , , PUNCT cc08hd78v4b 9 12 based base VERB cc08hd78v4b 9 13 on on ADP cc08hd78v4b 9 14 the the DET cc08hd78v4b 9 15 coarse coarse ADJ cc08hd78v4b 9 16 quantization quantization NOUN cc08hd78v4b 9 17 of of ADP cc08hd78v4b 9 18 complex complex ADJ cc08hd78v4b 9 19 coefficients coefficient NOUN cc08hd78v4b 9 20 in in ADP cc08hd78v4b 9 21 creating create VERB cc08hd78v4b 9 22 the the DET cc08hd78v4b 9 23 iris iris PROPN cc08hd78v4b 9 24 code code PROPN cc08hd78v4b 9 25 . . PUNCT cc08hd78v4b 10 1 another another DET cc08hd78v4b 10 2 source source NOUN cc08hd78v4b 10 3 of of ADP cc08hd78v4b 10 4 inconsistency inconsistency NOUN cc08hd78v4b 10 5 in in ADP cc08hd78v4b 10 6 the the DET cc08hd78v4b 10 7 iris iris PROPN cc08hd78v4b 10 8 code code PROPN cc08hd78v4b 10 9 is be AUX cc08hd78v4b 10 10 dilation dilation NOUN cc08hd78v4b 10 11 of of ADP cc08hd78v4b 10 12 the the DET cc08hd78v4b 10 13 iris iris NOUN cc08hd78v4b 10 14 . . PUNCT cc08hd78v4b 11 1 the the DET cc08hd78v4b 11 2 majority majority NOUN cc08hd78v4b 11 3 of of ADP cc08hd78v4b 11 4 iris iris PROPN cc08hd78v4b 11 5 research research PROPN cc08hd78v4b 11 6 ignores ignore VERB cc08hd78v4b 11 7 the the DET cc08hd78v4b 11 8 degree degree NOUN cc08hd78v4b 11 9 of of ADP cc08hd78v4b 11 10 dilation dilation NOUN cc08hd78v4b 11 11 in in ADP cc08hd78v4b 11 12 processing process VERB cc08hd78v4b 11 13 iris iris NOUN cc08hd78v4b 11 14 images image NOUN cc08hd78v4b 11 15 for for ADP cc08hd78v4b 11 16 biometric biometric ADJ cc08hd78v4b 11 17 purposes purpose NOUN cc08hd78v4b 11 18 . . PUNCT cc08hd78v4b 12 1 i i PRON cc08hd78v4b 12 2 experimentally experimentally ADV cc08hd78v4b 12 3 quantify quantify VERB cc08hd78v4b 12 4 how how SCONJ cc08hd78v4b 12 5 much much ADJ cc08hd78v4b 12 6 the the DET cc08hd78v4b 12 7 hamming hamming NOUN cc08hd78v4b 12 8 distance distance NOUN cc08hd78v4b 12 9 is be AUX cc08hd78v4b 12 10 affected affect VERB cc08hd78v4b 12 11 by by ADP cc08hd78v4b 12 12 iris iris NOUN cc08hd78v4b 12 13 dilation dilation NOUN cc08hd78v4b 12 14 . . PUNCT