He was found by his son on the floor next to his bed, who called EMS.
 Patient was unconscious
(ROOT (S (NP (PRP He)) (VP (VBD was) (VP (VBN found) (PP (IN by) (NP (NP (PRP$ his) (NN son)) (PP (IN on) (NP (DT the) (NN floor))) (ADVP (JJ next) (PP (TO to) (NP (NP (PRP$ his) (NN bed)) (, ,) (SBAR (WHNP (WP who)) (S (VP (VBD called) (NP (NNP EMS)))))))))))) (. .)))
(ROOT (S (NP (NN Patient)) (VP (VBD was) (ADJP (JJ unconscious)))))
( He ( ( was ( found ( by ( ( ( his son ) ( on ( the floor ) ) ) ( next ( to ( ( ( his bed ) , ) ( who ( called EMS ) ) ) ) ) ) ) ) ) . ) )
( Patient ( was unconscious ) )