(S (S (S (BASENP (NN Incident)) (VP (VP (VBZ is) (ADVP (RB currently))) (PP (IN under) (NP (BASENP (NN investigation)) (PP (IN by) (BASENP (NNS stewards))))))) (COLON -) (S (BASENP (NNP Sato) (CC and) (NNP Albers)) (VP (MD could) (VP (VB be) (VP (VBN penalized) (PP (IN for) (S (VP (VBG ignoring) (BASENP (ADJP (JJ waving) (JJ blue)) (NNS flags)))))))))) (PERIOD .))