Assertion: portage | /r/HasProperty | mapped by george vancouver
Facets:
value: a century later
type: TEMPORAL
value: in 1792
type: TEMPORAL
Source sentences:
text: Portage was mapped twice, first by George Vancouver in 1792, who saw it as a connecting isthmus and named the island “Vashon’s Island;” and half a century later by Charles Wilkes of the American Exploring Expedition, who saw it as a tidal flat and thus two islands, naming Maury as a separate island after Lt.