(S (S (ADVP (RB Instead)) (COMMA ,) (S (BASENP (PRP it)) (VP (VBZ is) (VP (VBN thought) (SBAR (S (BASENP (QT (DQL `) (JJ soft) (DQR ')) (NN ice)) (VP (VP (VBD formed) (PP (IN in) (BASENP (DT the) (NN pipes)))) (CC and) (VP (ADVP (RB then)) (VP (VP (VBD broke) (PRT (RP off))) (COMMA ,) (S (VP (VP (VBG traveling) (PP (TO to) (BASENP (DT the) (NN fuel) (CC /) (NN oil) (NN heat) (NN exchanger)))) (CC and) (VP (VBG restricting) (BASENP (PRP it)))))))))))))) (PERIOD .))