who deserve but rarely receive it 
(ROOT (SBAR (WHNP (WP who)) (S (VP (VP (VBP deserve)) (CC but) (ADVP (RB rarely)) (VP (VBP receive) (NP (PRP it)))))))
(ROOT (SBAR (WHNP (WP )) (S (VP (VP (VBP )) (CC ) (ADVP (RB )) (VP (VBP ) (NP (PRP )))))))