Jon's defense began to weaken and slow.
( ( ( Jon 's ) defense ) ( ( began ( to ( ( weaken and ) slow ) ) ) . ) )
(ROOT (S (NP (NP (NNP Jon) (POS 's)) (NN defense)) (VP (VBD began) (S (VP (TO to) (VP (VB weaken) (CC and) (VB slow))))) (. .)))
He slowed and tried to regain his strength.
( He ( ( ( slowed and ) ( tried ( to ( regain ( his strength ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VP (VBD slowed)) (CC and) (VP (VBD tried) (S (VP (TO to) (VP (VB regain) (NP (PRP$ his) (NN strength))))))) (. .)))