39.在 HNPCC（hereditary nonpolyposis colorectal cancer）患者中，最常見的腸道外腫瘤為何？ A.膀胱癌 B.胃癌 C.子宮內膜癌 D.卵巢癌
Parser adapted from Manning, Christopher D., et al. "The stanford corenlp natural language processing toolkit." 2014.
Visualisation provided using the brat visualisation/annotation software.