Assertion: relapsing fever | /r/HasProperty | characterized by recurrent fever
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Source sentences:
text: Relapsing fever is a group of infections caused by spirochetes in the genus Borrelia that are characterized by recurrent fever and found throughout the world (1, 15, 16, 19, 24, 27, 31, 32, 33, 38, 42, 47, 52,56, 59, 61, 69, 70, 71, 76, 78, 82, 86).