Last night, he began having chest pain at rest.
 patient denies chest pain
(ROOT (S (NP (JJ Last) (NN night)) (, ,) (NP (PRP he)) (VP (VBD began) (S (VP (VBG having) (NP (NN chest) (NN pain)) (PP (IN at) (NP (NN rest)))))) (. .)))
(ROOT (S (NP (NN patient)) (VP (VBZ denies) (NP (NN chest) (NN pain)))))
( ( Last night ) ( , ( he ( ( began ( ( having ( chest pain ) ) ( at rest ) ) ) . ) ) ) )
( patient ( denies ( chest pain ) ) )