Only trouble was, they had infinite ammunition...we only had so many bullets.
( ( ( ( ( Only trouble ) ( ( was , ) ( they ( had ( infinite ammunition ) ) ) ) ) ... ) ( we ( only ( had ( ( so many ) bullets ) ) ) ) ) . )
(ROOT (S (S (NP (RB Only) (NN trouble)) (VP (VBD was) (, ,) (SBAR (S (NP (PRP they)) (VP (VBD had) (NP (JJ infinite) (NN ammunition))))))) (: ...) (S (NP (PRP we)) (ADVP (RB only)) (VP (VBD had) (NP (ADJP (RB so) (JJ many)) (NNS bullets)))) (. .)))
We had the advantage of having more bullets than them.
( We ( ( had ( ( the advantage ) ( of ( ( having ( more bullets ) ) ( than them ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBD had) (NP (NP (DT the) (NN advantage)) (PP (IN of) (S (VP (VBG having) (NP (JJR more) (NNS bullets)) (PP (IN than) (NP (PRP them)))))))) (. .)))