segmentation: chick in train
rank.candidate: chick in tr a in chic kin train chic ki n train chi ck in train chic kintra in chickint rain chick in tra in ch ick in train chick intrain chick int rain chickin train chick intr a in chick i nt rain chick intra in chick i ntra in chick in train c hick in train chick int ra in chick in trai n chick intr ain