Assertion: frigate's speed | /r/HasProperty | over 20 knots
Facets:
Source sentences:
text: Maximum speed is over 20 knots (37 km/h; 23 mph), with a maximum sustainable full-load speed of 19 knots (35 km/h; 22 mph), and an economical cruising speed of 15 knots (28 km/h; 17 mph).