History of myeloproliferative disorder.
 No history of hematologic abnormality
(ROOT (NP (NP (NP (NN History)) (PP (IN of) (NP (JJ myeloproliferative) (NN disorder)))) (. .)))
(ROOT (NP (NP (DT No) (NN history)) (PP (IN of) (NP (JJ hematologic) (NN abnormality)))))
( ( History ( of ( myeloproliferative disorder ) ) ) . )
( ( No history ) ( of ( hematologic abnormality ) ) )