Assertion: national park's visitor | /r/CapableOf | explore some of the greatest threats
Facets:
Source sentences:
text: Threatened Lake Michigan:  Several times a year, visitors and a ranger at the Dorothy Buell Memorial Visitor Center can explore some of the greatest threats facing Lake Michigan.
text: Several times a year, visitors and a ranger at the Dorothy Buell Memorial Visitor Center can explore some of the greatest threats facing Lake Michigan.