Table 3.

Relations and knowledge tuples

Type	Explanation	Subject	Object	Example KB Tuple
hasSymptom	a diease has a symptom	Disease	Symptom	$⟨$“pneumonia,” hasSymptom, “fever”$⟩$
needsTest	a test helps to diagnose a disease	Disease	Test	$⟨$“pneumonia,” needsTest, “LeukocyteCounting”$⟩$
hasTestResult	a test result indicates a diease	Disease	Result	$⟨$“pneumonia,” hasTestResult, “LeukocyteHighCount”$⟩$
needsTreatment	a treatment cures a disease	Disease	Treatment	$⟨$“pneumonia,” needsTreatment, “Levofloxcin”$⟩$
hasResult	a test can have a result	Test	Result	$⟨$“LeukocyteCounting”, hasResult, “LeukocyteHighCount”$⟩$