watching these two actors play against each other so intensely , but with restraint 
(ROOT (S (VP (VBG watching) (S (NP (DT these) (CD two) (NNS actors)) (VP (VB play) (PP (IN against) (NP (DT each) (JJ other))) (ADVP (RB so) (RB intensely)) (, ,) (CC but) (PP (IN with) (NP (NN restraint))))))))
(ROOT (S (VP (VBG ) (S (NP (DT ) (CD ) (NNS )) (VP (VB ) (PP (IN ) (NP (DT ) (JJ ))) (ADVP (RB ) (RB )) (, ) (CC ) (PP (IN ) (NP (NN ))))))))