Pulse returned at 7:05.
 The patient was unstable  
(ROOT (S (NP (NN Pulse)) (VP (VBD returned) (PP (IN at) (NP (CD 7:05)))) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBD was) (ADJP (JJ unstable)))))
( Pulse ( ( returned ( at 7:05 ) ) . ) )
( ( The patient ) ( was unstable ) )