( ( Boron trioxide ) ( ( is ( produced ( by ( ( treating borax ) ( with ( ( sulfuric acid ) ( in ( a ( fusion furnace ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Boron) (NNP trioxide)) (VP (VBZ is) (VP (VBN produced) (PP (IN by) (S (VP (VBG treating) (NP (NN borax)) (PP (IN with) (NP (NP (JJ sulfuric) (NN acid)) (PP (IN in) (NP (DT a) (NN fusion) (NN furnace)))))))))) (. .)))
Boron trioxide is produced by treating borax with sulfuric acid in a fusion furnace.
(ROOT (S (NP (NNP Sulfur)) (VP (MD can) (VP (VB combine) (PP (IN with) (NP (NN oxygen))) (S (VP (TO to) (VP (VB produce) (NP (NN sulfur) (NN trioxide))))))) (. .)))