▁lingu istic ▁corpor a ▁available ▁today , ▁the ▁tf – id f ▁value ▁which ▁origin ated ▁in ▁information ▁retr ieval , ▁can ▁be ▁successfully ▁applied ▁to ▁identify ▁the ▁key ▁words ▁of ▁a ▁text : ▁If ▁for ▁example ▁the ▁word ▁" cat " ▁occurs ▁significantly ▁more ▁often ▁in ▁the ▁text ▁to ▁be ▁summar ized ▁( TF ▁= ▁" term ▁frequency ") ▁than ▁in ▁the ▁cor pus ▁( ID F ▁means ▁" in verse ▁document ▁frequency "; ▁here ▁the ▁cor pus ▁is ▁meant ▁by ▁" document "), ▁then ▁" cat " ▁is ▁likely ▁to ▁be ▁an ▁important ▁word ▁of ▁the ▁text ; ▁the ▁text ▁may ▁in ▁fact ▁be ▁a ▁text ▁about ▁c ats . ▁ ▁See ▁also ▁▁ ▁Text ▁segment ation ▁ ▁Sent ence ▁boundary ▁dis ambiguation ▁ ▁References ▁▁ ▁Category : Comput ational ▁lingu istics ▁Category : N atural ▁language ▁processing <0x0A> </s> ▁Is omet rus ▁g ary i ▁is ▁a ▁species ▁of ▁sc orp ion ▁in ▁the ▁family ▁But h idae . ▁It ▁is ▁en demic ▁to ▁Sri ▁L anka . ▁It ▁is ▁not ▁known ▁fatal ▁to ▁humans . ▁ ▁References ▁ ▁Academ is . edu ▁ ▁Category : Anim als ▁described ▁in ▁ 2 0 0 2 ▁Category : S cor p ions ▁of ▁Asia ▁Category : End em ic ▁fa una ▁of ▁Sri ▁L anka ▁g ary i <0x0A> </s> ▁D AA - 1 1 0 6 ▁is ▁a ▁drug ▁which ▁acts ▁as ▁a ▁pot ent ▁and ▁select ive ▁ag on ist ▁at ▁the ▁peri pher al ▁ben z odia ze