Assertion: american pioneer | /r/CapableOf | build the flatboatat sumrill's ferry
Facets:
value: on the youghiogheny river
type: LOCATION
value: during march
type: TEMPORAL
Source sentences:
text: Adventure galley at Sumrill's Ferry on the American pioneers building the flatboatat Sumrill's Ferry on the Youghiogheny River during March 1788.