His Coumadin has been on hold for eye surgery.
 His anticoagulant has been stopped temporarily
(ROOT (S (NP (PRP$ His) (NNP Coumadin)) (VP (VBZ has) (VP (VBN been) (PP (IN on) (NP (NN hold))) (PP (IN for) (NP (NN eye) (NN surgery))))) (. .)))
(ROOT (S (NP (PRP$ His) (NN anticoagulant)) (VP (VBZ has) (VP (VBN been) (VP (VBN stopped) (ADVP (RB temporarily)))))))
( ( His Coumadin ) ( ( has ( ( been ( on hold ) ) ( for ( eye surgery ) ) ) ) . ) )
( ( His anticoagulant ) ( has ( been ( stopped temporarily ) ) ) )