Assertion: napoleon's fleet | /r/CapableOf | use frigate
Facets:
value: to keep a constant watch
type: PURPOSE
value: faster,
type: MANNER
Source sentences:
text: The British fleet used frigates (faster, but too fragile for the line of battle), to keep a constant watch on the harbour, while the main force remained out of sight, approximately 50 miles (80 km) west of the shore.