Assertion: callus | /r/HasSubevent | skin ulceration
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: Calluses are generally not harmful, but may sometimes lead to other problems, such as skin ulceration or infection.
text: While they can be perceived as being unsightly, calluses are generally not harmful, but if neglected for long periods may sometimes lead to other problems, such as a skin ulceration or infection, or cause the sufferer to try to offload the affected painful area, which can place excessive stress on the asymptomatic side.