He did who felt down their purple boulders to the boy by songs .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 He)) (VP_4 (VBD_0 did) (SBAR_0 (WHNP_0 (WP_0 who)) (S_2 (VP_0 (ATVP_4 (VBD_2 felt) (PP_2 (IN_0 down) (NP_3 (PRPDOLLAR_0 their) (NP_4 (JJ_1 purple) (NNS_1 boulders))))) (PP_2 (TO_0 to) (NP_3 (NP_5 (DT_0 the) (NN_2 boy)) (PP_0 (IN_1 by) (NP_6 (NNS_1 songs)))))))))) (DOT_0 .)))