(S (S (PP (IN In) (BASENP (NN 1951))) (S (BASENP (PRP they)) (VP (VP (VBD set) (PRT (RP out))) (PP (IN on) (NP (NP (BASENP (DT an) (JJ eight-month) (NN motorcycle) (NN trip)) (PP (IN through) (BASENP (NNP South) (NNP American)))) (SBAR (WHNP (WDT that)) (S (VP (VP (VBD exposed) (BASENP (PRP them))) (PP (TO to) (NP (BASENP (DT the) (NN poverty)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (BASENP (JJS most) (NNP South) (NNPS Americans)) (VP (VBD lived)))))))))))))) (PERIOD .))