The students' reaction was swift and contentious, as if their feelings had been hurt.
( ( ( The ( students ' ) ) reaction ) ( ( ( ( was ( ( swift and ) contentious ) ) , ) ( as ( if ( ( their feelings ) ( had ( been hurt ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS students) (POS ')) (NN reaction)) (VP (VBD was) (ADJP (JJ swift) (CC and) (JJ contentious)) (, ,) (SBAR (RB as) (IN if) (S (NP (PRP$ their) (NNS feelings)) (VP (VBD had) (VP (VBN been) (VP (VBN hurt))))))) (. .)))
The students reacted with horror.
( ( The students ) ( ( reacted ( with horror ) ) . ) )
(ROOT (S (NP (DT The) (NNS students)) (VP (VBD reacted) (PP (IN with) (NP (NN horror)))) (. .)))