stars was worried by anything Of class .
(ROOT_0 (S_0 (ATS_3 (NP_1 (NNS_0 stars)) (VP_4 (VBD_1 was) (VP_2 (VBN_0 worried) (PP_2 (IN_0 by) (NP_3 (NP_5 (NN_3 anything)) (PP_0 (IN_1 Of) (NP_2 (NN_3 class)))))))) (DOT_0 .)))