(S (S (PP (IN In) (BASENP (NNP New) (NNP York) (NNP City))) (COMMA ,) (S (NP (NP (BASENP (NNP Department)) (PP (IN of) (BASENP (NNP Transportation)))) (NNS employees)) (VP (VP (VBD worked) (BASENP (DT a) (JJ twelve-hour) (JJ overtime) (NN shift))) (S (VP (TO to) (VP (VP (VP (VB salt) (CC and) (VB plow)) (BASENP (DT the) (NN snow))) (PP (IN from) (BASENP (NNS streets) (CC and) (NNS highways))))))))) (PERIOD .))