▁be ans ▁only . ▁This ▁difference ▁between ▁c - selection ▁and ▁sub c ategor ization ▁depends ▁cru cially ▁on ▁the ▁understanding ▁of ▁sub c ategor ization . ▁An ▁approach ▁to ▁sub c ategor ization ▁that ▁sees ▁pred ic ates ▁as ▁sub c ategor izing ▁for ▁their ▁subject ▁arguments ▁as ▁well ▁as ▁for ▁their ▁object ▁arguments ▁will ▁draw ▁no ▁distinction ▁between ▁c - selection ▁and ▁sub c ategor ization ; ▁the ▁two ▁concepts ▁are ▁syn onymous ▁for ▁such ▁approaches . ▁ ▁Th ematic ▁relations ▁Selection ▁can ▁be ▁closely ▁associated ▁with ▁them atic ▁relations ▁( e . g . ▁agent , ▁patient , ▁theme , ▁goal , ▁etc .). ▁By ▁limit ing ▁the ▁semantic ▁content ▁of ▁their ▁arguments , ▁pred ic ates ▁are ▁determ ining ▁the ▁them atic ▁relations / ro les ▁that ▁their ▁arguments ▁bear . ▁ ▁The ories ▁Several ▁lingu istic ▁theories ▁make ▁explicit ▁use ▁of ▁selection . ▁These ▁include : ▁ ▁Oper ator ▁grammar , ▁which ▁makes ▁selection ▁a ▁central ▁part ▁of ▁the ▁theory . ▁ ▁Link ▁grammar , ▁which ▁assign s ▁a ▁( f lo ating ▁point ) ▁log - lik elihood ▁" cost " ▁to ▁each ▁context ▁a ▁word ▁can ▁appear ▁in , ▁thus ▁providing ▁an ▁explicit ▁numeric ▁estimate ▁of ▁the ▁lik elihood ▁of ▁a ▁parse . ▁ ▁Notes ▁ ▁Liter ature ▁Br inton , ▁L . ▁ 2 0 0 0 . ▁The ▁structure ▁of ▁modern ▁English . ▁Amsterdam : John ▁Ben j am ins ▁Publishing ▁Company . ▁Car nie , ▁A . ▁ 2 0 0 7 .