(S (S (S (NP (BASENP (DT An) (NN ambulance) (NN crew)) (PP (IN in) (BASENP (DT the) (NN area)))) (VP (VBD alerted) (BASENP (NN police)))) (SBAR (IN after) (S (VP (VBG seeing) (NP (BASENP (NN smoke)) (PP (IN inside) (BASENP (DT the) (NN car)))))))) (PERIOD .))