Behind a thick sweater , lesson had Several and moved .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (PP_2 (IN_0 Behind) (NP_6 (ATNP_1 (DT_0 a) (JJ_1 thick)) (NN_1 sweater))) (COMMA_0 ,)) (NP_0 (NN_2 lesson))) (VP_3 (VBD_1 had) (ADJP_0 (ATADJP_0 (JJ_0 Several) (CC_0 and)) (VBN_0 moved)))) (DOT_0 .)))