( ( Formic acid ) ( ( is ( ( the ( same poison ) ) ( found ( in ( ( the sting ) ( of ( fire ants ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Formic) (NN acid)) (VP (VBZ is) (NP (NP (DT the) (JJ same) (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 the same 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))))))) (. .)))