you feel good , you feel sad , 
(ROOT (S (S (NP (PRP you)) (VP (VBP feel) (ADJP (JJ good)))) (, ,) (S (NP (PRP you)) (VP (VBP feel) (ADJP (JJ sad)))) (, ,)))
(ROOT (S (S (NP (PRP )) (VP (VBP ) (ADJP (JJ )))) (, ) (S (NP (PRP )) (VP (VBP ) (ADJP (JJ )))) (, )))