Jon was fighting at full speed, sweat forming on his brow.
( Jon ( ( was ( fighting ( at ( ( ( full speed ) , ) ( sweat ( forming ( on ( his brow ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Jon)) (VP (VBD was) (VP (VBG fighting) (PP (IN at) (NP (NP (JJ full) (NN speed)) (, ,) (NP (NP (NN sweat)) (VP (VBG forming) (PP (IN on) (NP (PRP$ his) (NN brow))))))))) (. .)))
Jon was sweating from his brow.
( Jon ( ( was ( sweating ( from ( his brow ) ) ) ) . ) )
(ROOT (S (NP (NNP Jon)) (VP (VBD was) (VP (VBN sweating) (PP (IN from) (NP (PRP$ his) (NN brow))))) (. .)))