( ( Formic acid ) ( ( is ( ( ( another bi-product ) ( of methanol ) ) ( which ( is ( ( the poison ) ( found ( in ( ( the sting ) ( of ( fire ants ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Formic) (NN acid)) (VP (VBZ is) (NP (NP (DT another) (NN bi-product)) (PP (IN of) (NP (NN methanol))) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (NP (NP (DT the) (NN poison)) (VP (VBN found) (PP (IN in) (NP (NP (DT the) (NN sting)) (PP (IN of) (NP (NN fire) (NNS ants)))))))))))) (. .)))
Formic acid is another bi-product of methanol which is the poison found in the sting of fire ants.
(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))))))) (. .)))