( ( ( ( formic acid ) , ) ( ( a venom ) ( in ( ant stings ) ) ) ) ; )
(ROOT (NP (NP (JJ formic) (NN acid)) (, ,) (NP (NP (DT a) (NN venom)) (PP (IN in) (NP (NN ant) (NNS stings)))) (: ;)))
formic acid, a venom in ant stings;
(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))))))) (. .)))