really really But they stop able good knees .
(ROOT_0 (S_0 (ATS_3 (ATS_4 (ATS_0 (ADVP_0 (RB_0 really)) (ADVP_0 (RB_0 really))) (CC_0 But)) (S_1 (NP_0 (PRP_1 they)) (VP_5 (VB_0 stop) (NP_3 (ATNP_0 (JJ_0 able) (JJ_1 good)) (NNS_0 knees))))) (DOT_0 .)))