why human beings long for what they do n't have 
(ROOT (SBAR (WHADVP (WRB why)) (S (NP (JJ human) (NNS beings)) (ADVP (RB long) (PP (IN for) (SBAR (WHNP (WP what)) (S (NP (PRP they)) (VP (VBP do) (RB n't) (VP (VB have))))))))))
(ROOT (SBAR (WHADVP (WRB )) (S (NP (JJ ) (NNS )) (ADVP (RB ) (PP (IN ) (SBAR (WHNP (WP )) (S (NP (PRP )) (VP (VBP ) (RB ) (VP (VB ))))))))))