Assertion: skater's skate | /r/HasProperty | led by gerrit jan van ingen schenau
Facets:
Source sentences:
text: Clap skates were developed at the Faculty of Human Movement Sciences of the Vrije Universiteit of Amsterdam, led by Gerrit Jan van Ingen Schenau, although the idea of a clap skate is much older; designs dating from around 1900 are known.