of Quechua across group granite , they began not narrowed boulders by two .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (PP_2 (IN_0 of) (NP_3 (NP_6 (NNP_1 Quechua)) (PP_0 (IN_1 across) (NP_2 (NN_2 group) (NN_3 granite))))) (COMMA_0 ,)) (NP_0 (PRP_1 they))) (VP_3 (ATVP_1 (VBD_1 began) (RB_1 not)) (VP_5 (VBD_1 narrowed) (NP_3 (NP_4 (NNS_1 boulders)) (PP_0 (IN_1 by) (NP_4 (CD_0 two))))))) (DOT_0 .)))