idiom knees should back was And was n<apostrophe>t listened purple .
(ROOT_0 (S_0 (ATS_3 (NP_1 (NN_1 idiom) (NNS_0 knees)) (VP_4 (ATVP_1 (VP_5 (MD_0 should) (VP_1 (ADVP_0 (RB_0 back)) (VBD_1 was))) (CC_0 And)) (VP_5 (ATVP_1 (VBD_1 was) (RB_1 n<apostrophe>t)) (VP_1 (VBN_0 listened) (ADJP_0 (JJ_0 purple)))))) (DOT_0 .)))