(S (S (BASENP (PRP It)) (VP (VBD was) (VP (ADVP (RB also)) (VP (VBN observed) (PP (PP (IN on) (BASENP (DT the) (JJ next) (NN night))) (CC and) (PP (ADVP (BASENP (NN two) (NNS weeks)) (RBR later)) (PP (IN on) (BASENP (NNP September) (NN 6))))))))) (PERIOD .))