(S (S (S (BASENP (NN Two) (NN fire) (NNS trucks)) (VP (VP (VP (VBD blasted) (BASENP (NN water))) (PP (IN at) (BASENP (DT the) (NN blaze)))) (PP (IN from) (ADVP (ADVP (RBR higher) (RB up)) (PP (IN on) (BASENP (DT the) (NN mountain))))))) (COMMA ,) (SBAR (IN while) (S (UCP (BASENP (DT every) (NN minute)) (CC or) (ADVP (RB so))) (COMMA ,) (S (BASENP (DT a) (JJ water-equipped) (NN helicopter)) (VP (MD would) (VP (VP (VP (VB swoop) (PRT (RP down))) (PP (IN over) (BASENP (DT the) (NNS flames)))) (CC and) (VP (VB release) (BASENP (PRPD its) (NN payload))))))))) (PERIOD .))