Assertion: skater's speed | /r/HasProperty | raised
Facets:
value: from 1971
type: TEMPORAL
Source sentences:
text: Suits and indoor skating, as well as the clap skate, has helped to lower long track world records considerably; from 1971 to 2009, the average speed on the men's 1500 metres has been raised from 45 to 52 km/h.
text: Suits and indoor skating, as well as the clap skate, has helped to lower long track world records considerably; from 1971 to 2007, the average speed on the men's 1500 metres was raised from 45 to 52 km/h (28 to 32 mph).