who enjoy moaning about their cruel fate 
(ROOT (SBAR (WHNP (WP who)) (S (VP (VBP enjoy) (S (VP (VBG moaning) (PP (IN about) (NP (PRP$ their) (JJ cruel) (NN fate)))))))))
(ROOT (SBAR (WHNP (WP )) (S (VP (VBP ) (S (VP (VBG ) (PP (IN ) (NP (PRP$ ) (JJ ) (NN )))))))))