(S (S (BASENP (DT The) (NN union)) (VP (VBZ claims) (SBAR (S (BASENP (PRP it)) (VP (VBZ is) (VP (ADVP (RB also)) (VP (VBG arguing) (PP (IN against) (NP (NP (BASENP (DT a) (NN lack)) (PP (IN of) (BASENP (NN career) (NN structure)))) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ has) (VP (VBN caused) (S (BASENP (JJ many) (NNS professionals)) (VP (TO to) (VP (VB leave) (BASENP (DT the) (NN health) (NN service)))))))))))))))))) (PERIOD .))