with an someone parents , it knew api surfers .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (PP_2 (IN_0 with) (NP_3 (ATNP_0 (DT_0 an) (NN_3 someone)) (NNS_0 parents))) (COMMA_0 ,)) (NP_0 (PRP_1 it))) (VP_3 (VBD_0 knew) (NP_3 (NN_0 api) (NNS_1 surfers)))) (DOT_0 .)))