( Aspartame ( also ( ( contains ( ( methanol ( -LRB- ( ( wood alcohol ) -RRB- ) ) ) ( which ( converts ( to ( ( ( ( formaldehyde and ) ( then formic ) ) acid ) ( -LRB- ( ( ant ( sting poison ) ) -RRB- ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNP Aspartame)) (ADVP (RB also)) (VP (VBZ contains) (NP (NP (NN methanol)) (PRN (-LRB- -LRB-) (NP (NN wood) (NN alcohol)) (-RRB- -RRB-)) (SBAR (WHNP (WDT which)) (S (VP (VBZ converts) (PP (TO to) (NP (NP (ADJP (ADJP (JJ formaldehyde)) (CC and) (ADJP (RB then) (JJ formic))) (NN acid)) (PRN (-LRB- -LRB-) (NP (CD ant) (NN sting) (NN poison)) (-RRB- -RRB-))))))))) (. .)))
Aspartame also contains methanol (wood alcohol) which converts to formaldehyde and then formic acid (ant sting poison).
(ROOT (S (NP (JJ Formic) (NN acid)) (VP (VBZ is) (VP (VBN found) (PP (IN in) (NP (NP (DT the) (NNS secretions)) (PP (IN of) (NP (JJ stinging) (NNS ants))))))) (. .)))