gives us mostly fool 's gold 
(ROOT (S (VP (VBZ gives) (NP (PRP us)) (NP (ADVP (RB mostly)) (NP (NN fool) (POS 's)) (NN gold)))))
(ROOT (S (VP (VBZ ) (NP (PRP )) (NP (ADVP (RB )) (NP (NN ) (POS )) (NN )))))