in his parents , eight knees were translating back .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (PP_2 (IN_0 in) (NP_3 (PRPDOLLAR_0 his) (NNS_0 parents))) (COMMA_0 ,)) (NP_0 (CD_0 eight) (NNS_0 knees))) (VP_3 (VBD_1 were) (VP_2 (VBG_0 translating) (PRT_0 (RP_0 back))))) (DOT_0 .)))