(S (S (S (VP (VBG Investigating) (BASENP (RB yet) (DT another) (NN alarm)))) (COMMA ,) (S (BASENP (PRP he)) (VP (VBD saw) (NP (BASENP (DT the) (NN shadow)) (PP (IN of) (BASENP (DT a) (VBG fleeing) (NN individual))))))) (PERIOD .))