(S (S (BASENP (DT The) (NNP Tireless)) (VP (VBD was) (VP (VP (VBN fitted) (PRN (COMMA ,) (PP (IN in) (BASENP (NN 2001))) (COMMA ,))) (PP (IN with) (NP (BASENP (DT an) (NN update)) (PP (TO to) (NP (BASENP (DT the) (NN piece)) (PP (IN of) (NP (BASENP (JJ air-purification) (NN machinery)) (VP (VBN thought) (S (VP (TO to) (VP (VB have) (VP (VBN failed))))))))))))))) (PERIOD .))