it worried of the class , Noah <apostrophe>s .
(ROOT_0 (S_0 (ATS_3 (NP_0 (PRP_1 it)) (VP_2 (VBN_0 worried) (PP_0 (IN_1 of) (NP_2 (ATNP_0 (NP_5 (DT_0 the) (NN_2 class)) (COMMA_0 ,)) (NP_4 (NNP_0 Noah) (POS_0 <apostrophe>s)))))) (DOT_0 .)))