(S (S (SBAR (IN While) (S (BASENP (PRPD her) (NNS parents)) (VP (VBD attended) (BASENP (DT the) (NN event))))) (COMMA ,) (S (NP (BASENP (NNP Winehouse)) (BASENP (PRP herself))) (VP (VBD was) (ADJP (ADJP (ADJP (RB too) (JJ busy)) (S (VP (VBG working)))) (SBAR (S (VP (TO to) (VP (VB attend))))))))) (PERIOD .))