However, their cumulative effect tends to be overpowering.
( However ( , ( ( their ( cumulative effect ) ) ( ( tends ( to ( be overpowering ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB However)) (, ,) (NP (PRP$ their) (JJ cumulative) (NN effect)) (VP (VBZ tends) (S (VP (TO to) (VP (VB be) (ADJP (JJ overpowering)))))) (. .)))
The effects, when put together, are overwhelming.
( ( ( ( ( The effects ) , ) ( when ( put together ) ) ) , ) ( ( are overwhelming ) . ) )
(ROOT (S (NP (NP (DT The) (NNS effects)) (, ,) (SBAR (WHADVP (WRB when)) (S (VP (VBD put) (ADVP (RB together))))) (, ,)) (VP (VBP are) (ADJP (JJ overwhelming))) (. .)))