I have a quick question about CTAKES. I am using AE “AggregatePlaintextUMLSProcessor.xml” and want to get some negation results by referring to polarity attribute. However, it turns out, for example “Negative for hepatitis”, is not negated. I think it is weird and I tried “No hepatitis”, “ Denies hepatitis” which return “polarity= -1”, but “Deny hepatitis.” returns “polarity=1”.
any one could give me some clue that what is wrong? Thank you!
