He sat a short distance from them, his eyes on Jon.
( He ( ( ( ( sat ( a ( short distance ) ) ) ( from ( ( them , ) ( his eyes ) ) ) ) ( on Jon ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD sat) (NP (DT a) (JJ short) (NN distance)) (PP (IN from) (NP (NP (PRP them)) (, ,) (NP (PRP$ his) (NNS eyes)))) (PP (IN on) (NP (NNP Jon)))) (. .)))
Getting ready to attack, he has his eyes on Jon.
( ( Getting ( ready ( to attack ) ) ) ( , ( he ( ( ( has ( his eyes ) ) ( on Jon ) ) . ) ) ) )
(ROOT (S (S (VP (VBG Getting) (ADJP (JJ ready) (S (VP (TO to) (VP (VB attack))))))) (, ,) (NP (PRP he)) (VP (VBZ has) (NP (PRP$ his) (NNS eyes)) (PP (IN on) (NP (NNP Jon)))) (. .)))