light the candles , bring out the cake 
(ROOT (S (S (VP (VB light) (NP (DT the) (NNS candles)))) (, ,) (VP (VB bring) (PRT (RP out)) (NP (DT the) (NN cake)))))
(ROOT (S (S (VP (VB ) (NP (DT ) (NNS )))) (, ) (VP (VB ) (PRT (RP )) (NP (DT ) (NN )))))