It would sheathed boulders but a kids .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 It)) (VP_4 (MD_0 would) (VP_1 (VBN_0 sheathed) (NP_1 (ATNP_0 (NP_4 (NNS_1 boulders)) (CC_0 but)) (NP_6 (DT_0 a) (NNS_1 kids)))))) (DOT_0 .)))