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(ROOT_0 (S_0 (ATS_3 (ATS_4 (S_1 (NP_0 (PRP_1 she)) (VP_5 (ATVP_4 (TICK_0 ``) (VBG_0 shaking)) (ADVP_0 (IN_2 if) (RB_1 quite)))) (CC_0 and)) (S_1 (ATS_1 (TICK_0 ``) (NP_1 (PRP_0 He))) (VP_3 (ATVP_3 (VBD_2 used) (PRT_0 (RP_0 down))) (S_2 (VP_0 (ATVP_0 (VP_5 (VBD_0 did) (PRT_0 (RP_0 up))) (COMMA_0 ,)) (NP_2 (DT_0 the) (NNS_1 surfers))))))) (DOT_0 .)))