(S (S (NP (BASENP (DT The) (NN ice)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBD was) (ADJP (JJ present))) (PP (IN in) (BASENP (NN 1912))))))) (VP (ADVP (RB gradually)) (VP (VP (VP (VBD decreased) (PP (IN by) (BASENP (NN 85) (NN %)))) (PP (IN by) (BASENP (NN 2000)))) (CONJP (COMMA ,) (CC and)) (VP (PP (IN by) (BASENP (NN 2007))) (NP (BASENP (DT another) (NN 26) (NN %)) (PP (IN of) (NP (BASENP (DT the) (NN amount)) (PP (IN in) (BASENP (NN 2000)))))))))) (PERIOD .))