Assertion: balloon | /r/HasProperty | filled with helium
Facets:
Source sentences:
text: It is becoming more common for balloons to be filled with air instead of helium, as air-filled balloons will not release into the atmosphere or deplete the earthly helium supply.
text: If the balloons that are filled with helium are made of rubber or latex, they will retain their buoyancy for a short time only (about a day) because helium has small molecules which escape through small pores of a balloon.