Assertion: syphilis | /r/HasProperty | unrecognizable
Facets:
value: often
type: TEMPORAL
value: in certain stages
type: TEMPORAL
Source sentences:
text: a person is infected with the bacterium through direct contact with a syphilis sore (which are often unrecognizable in certain stages), the incubation period for treponema pallidum can range from ten to ninety days, with an average of twenty-ones days before the first symptoms appear .