(S (S (PP (IN Despite) (NP (BASENP (NN repair) (NN work)) (VP (VBN conducted) (PP (IN during) (BASENP (DT the) (NN night)))))) (COMMA ,) (S (BASENP (PRP it)) (VP (VP (VBD was) (ADJP (JJ impossible))) (S (VP (TO to) (VP (VB power) (NP (DT all) (NP (BASENP (NN trolleybus) (CC and) (NN tram)) (NNS lines))))))))) (PERIOD .))