(S (S (NP (BASENP (DT An) (NN incident)) (SBAR (WDT that) (S (BASENP (NNS people)) (VP (VBD worried))))) (VP (VP (MD would) (VP (VB cause) (NP (BASENP (DT a) (NN delay)) (PP (IN of) (BASENP (NNS hours)))))) (COMMA ,) (VP (VBD was) (VP (VP (VBN cleared) (PRT (RP up))) (PP (IN in) (BASENP (QP (RB around) (NN 20)) (NNS minutes))))))) (PERIOD .))