(S (S (BASENP (DT This)) (VP (VBZ is) (NP (NP (NP (BASENP (DT the) (JJS largest) (NN shelf)) (PP (IN of) (BASENP (NN ice)))) (ADVP (RB so) (RB far))) (SBAR (S (VP (TO to) (VP (VB have) (VP (VBN disintegrated) (PP (IN in) (BASENP (DT the) (NNP Antarctic))))))))))) (PERIOD .))