(S (S (BASENP (NN Wreckage)) (VP (VBZ is) (VP (VBN reported) (S (VP (TO to) (VP (VB cover) (NP (BASENP (QP (RB nearly) (NN 3)) (NN sq) (NN mi)) (PRN (LRB -LRB-) (BASENP (NN 4) (NN km2)) (RRB -RRB-))))))))) (PERIOD .))