( ( ( ( ( ( Unusual Fire ) and ) ( Explosion Hazards ) ) : ) ( Hazards ( which ( might ( occur ( from ( ( ( ( ( overheating or ) burning ) ( of substance ) ) , ) ( including ( ( any ( chemical ( ( reactions or ) changes ) ) ) ( in ( chemical ( ( form or ) composition ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NP (NNP Unusual) (NNP Fire)) (CC and) (NP (NNP Explosion) (NNP Hazards))) (: :) (NP (NP (NNP Hazards)) (SBAR (WHNP (WDT which)) (S (VP (MD might) (VP (VB occur) (PP (IN from) (NP (NP (NN overheating) (CC or) (NN burning)) (PP (IN of) (NP (NN substance))) (, ,) (PP (VBG including) (NP (NP (DT any) (JJ chemical) (NNS reactions) (CC or) (NNS changes)) (PP (IN in) (NP (NN chemical) (NN form) (CC or) (NN composition)))))))))))) (. .)))
Unusual Fire and Explosion Hazards: Hazards which might occur from overheating or burning of substance, including any chemical reactions or changes in chemical form or composition.
(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))) (. .)))