Assertion: water polo | /r/HasProperty | introduced in the olympics
Facets:
Source sentences:
text: Fact 8: Water polo was introduced in the Olympics in 1990.
text: Although the game quickly became immensely popular as a sport, it wasn’t until the 1900 Paris Games that water polo was introduced to the Olympics.
text: Water polo was introduced in the Olympics in 1990.The special kick that water polo players do while they're not swimming in the water is called "Egg beater".