(SINV (SINV (S (BASENP (DT The) (NN snap)) (VP (VBD was) (VP (VBN caused) (PP (IN by) (NP (BASENP (DT a) (QT (DQL ``) (JJ fatigued) (DQR '')) (NN air) (NN pipe)) (SBAR (WHNP (WDT which)) (S (VP (VP (VBD burst)) (CC and) (VP (VP (VBD fell) (PRT (RP down))) (NP (BASENP (DT the) (NN shaft)) (VP (VBG damaging) (NP (DT the) (QT (DQL ``) (QTC (NP (BASENP (NN steelwork)) (CC and) (BASENP (JJ electrical) (NN feeder) (NNS cords))) (COMMA ,)) (DQR '')))))))))))))) (SINV (VP (VBD added)) (BASENP (NNP Soares)))) (PERIOD .))