( Once ( ( ingested ( ( ( the methanol ) , ) ( ( wood alcohol ) ( that ( has ( ( ( ( killed or ) blinded ) ( thousands ( of ( ( ( skid ( row drunks ) ) , ) converts ) ) ) ) ( into ( ( ( ( formaldehyde and ) formic ) acid ) ( -LRB- ( ( ant ( sting poison ) ) -RRB- ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (SINV (ADVP (RB Once)) (VP (VBD ingested)) (NP (NP (DT the) (NN methanol)) (, ,) (NP (NP (NN wood) (NN alcohol)) (SBAR (WHNP (WDT that)) (S (VP (VBZ has) (VP (VBN killed) (CC or) (VBN blinded) (NP (NP (NNS thousands)) (PP (IN of) (NP (NP (NN skid) (NN row) (NNS drunks)) (, ,) (NP (NNS converts))))) (PP (IN into) (NP (NP (ADJP (JJ formaldehyde) (CC and) (JJ formic)) (NN acid)) (PRN (-LRB- -LRB-) (NP (CD ant) (NN sting) (NN poison)) (-RRB- -RRB-)))))))))) (. .)))
Once ingested the methanol, wood alcohol that has killed or blinded thousands of skid row drunks, converts into formaldehyde and 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))))))) (. .)))