Throwing up.
( ( Throwing up ) . )
(ROOT (S (VP (VBG Throwing) (PRT (RP up))) (. .)))
Throwing up due to alcohol poisoning.
( ( ( Throwing up ) ( ( due ( to alcohol ) ) poisoning ) ) . )
(ROOT (S (VP (VBG Throwing) (PRT (RP up)) (NP (ADJP (JJ due) (PP (TO to) (NP (NN alcohol)))) (NN poisoning))) (. .)))