and , Noah refer they discovered about .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (CC_0 and) (COMMA_0 ,)) (NP_0 (NNP_0 Noah))) (VP_3 (VBP_0 refer) (SBAR_0 (S_1 (NP_0 (PRP_1 they)) (VP_5 (VBD_0 discovered) (PRT_0 (RP_0 about))))))) (DOT_0 .)))