the only young people who possibly will enjoy it 
(ROOT (NP (NP (DT the) (JJ only) (JJ young) (NNS people)) (SBAR (WHNP (WP who)) (S (ADVP (RB possibly)) (VP (MD will) (VP (VB enjoy) (NP (PRP it))))))))
(ROOT (NP (NP (DT ) (JJ ) (JJ ) (NNS )) (SBAR (WHNP (WP )) (S (ADVP (RB )) (VP (MD ) (VP (VB ) (NP (PRP ))))))))