Assertion: swan's population | /r/CapableOf | exist on the river thames
Facets:
value: at marlow
type: LOCATION
Source sentences:
text: A small population of black swans exists on the River Thames at Marlow, on the Brook running through the small town of Dawlish in Devon (they have become the symbol of the town), near the River Itchen, Hampshire, and the River Tees near Stockton on Tees.