we <apostrophe>m because it forced and it sounded Her perch .
(ROOT_0 (S_0 (ATS_3 (ATS_4 (S_1 (NP_0 (PRP_1 we)) (VP_5 (VBP_0 <apostrophe>m) (SBAR_0 (IN_2 because) (S_1 (NP_0 (PRP_1 it)) (VP_5 (VBD_1 forced)))))) (CC_0 and)) (S_1 (NP_0 (PRP_1 it)) (VP_5 (VBD_1 sounded) (NP_3 (PRPDOLLAR_0 Her) (NN_0 perch))))) (DOT_0 .)))