( ( For ( ( chemical burns ) ( ( follow ( the directions ) ) ( on ( the container ) ) ) ) ) ( ( the substance ) ( ( came in ) . ) ) )
(ROOT (S (SBAR (IN For) (S (NP (NN chemical) (NNS burns)) (VP (VBP follow) (NP (DT the) (NNS directions)) (PP (IN on) (NP (DT the) (NN container)))))) (NP (DT the) (NN substance)) (VP (VBD came) (PRT (RP in))) (. .)))
For chemical burns follow the directions on the container the substance came in.
(ROOT (S (NP (NP (DT The) (NN action)) (PP (IN of) (S (VP (VBG burning) (NP (NP (DT a) (NN piece)) (PP (IN of) (NP (NN wood)))))))) (VP (VBZ forms) (NP (DT a) (JJ different) (NN chemical) (NN substance))) (. .)))