pity anyone who sees this 
(ROOT (S (VP (VB pity) (NP (NP (NN anyone)) (SBAR (WHNP (WP who)) (S (VP (VBZ sees) (NP (DT this)))))))))
(ROOT (S (VP (VB ) (NP (NP (NN )) (SBAR (WHNP (WP )) (S (VP (VBZ ) (NP (DT )))))))))