(S (S (S (BASENP (NN Construction) (NNS workers)) (VP (VBD escaped) (BASENP (NN injury)))) (COMMA ,) (S (ADVP (RB luckily)) (S (BASENP (PRP they)) (VP (VP (VBD were) (PP (IN on) (BASENP (DT a) (NN coffee) (NN break)))) (PP (IN at) (NP (BASENP (DT the) (NN time)) (PP (IN of) (BASENP (DT the) (NN incident))))))))) (PERIOD .))