They keep muddy kids But smiled forested knees .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (ATVP_1 (ATVP_2 (VB_0 keep) (NP_4 (JJ_1 muddy) (NNS_1 kids))) (CC_0 But)) (VP_5 (VBD_1 smiled) (NP_3 (JJ_1 forested) (NNS_0 knees))))) (DOT_0 .)))