( Basically ( it ( ( ( amounts ( to ( an ( inflammatory reaction ) ) ) ) ( to ( substances ( not ( normally ( reacted to ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Basically)) (NP (PRP it)) (VP (VBZ amounts) (PP (TO to) (NP (DT an) (JJ inflammatory) (NN reaction))) (PP (TO to) (NP (NP (NNS substances)) (VP (RB not) (ADVP (RB normally)) (VBN reacted) (PP (TO to)))))) (. .)))
Basically it amounts to an inflammatory reaction to substances not normally reacted to.
(ROOT (S (NP (NNP Combustion) (NN reaction)) (VP (VBZ occurs) (SBAR (WHADVP (WRB when)) (S (NP (DT a) (NN substance)) (VP (VBZ reacts) (ADVP (RB quickly)) (PP (IN with) (NP (NN oxygen))))))) (. .)))