(S (S (BASENP (NNP Vanhanen)) (VP (ADVP (RB also)) (VP (VBD stated) (SBAR (IN that) (S (BASENP (PRP he)) (VP (VBD felt) (SBAR (S (BASENP (PRP it)) (VP (VP (VP (VBD was) (ADJP (JJ important))) (SBAR (S (BASENP (DT the) (NN incident)) (VP (VBD was) (VP (ADVP (RB thoroughly)) (VP (VBN investigated))))))) (SBAR (SBAR (IN because) (IN of)) (S (S (BASENP (NN safety) (NNS implications)) (VP (VBD incurred))) (SBAR (IN if) (S (BASENP (NN aircraft)) (VP (VBP stray) (PP (IN from) (BASENP (PRPD their) (VBN designated) (NN flight) (NNS paths))))))))))))))))) (PERIOD .))