Assertion: tractor's weight | /r/HasProperty | added in the form of rocks
Facets:
Source sentences:
text: In other situations, a flat board or skid would have a horse or team of horses then hitched to it; weight would be added, usually in the form of rocks, and the driver would urge his horses to pull the load, with more weight added as competitors were eliminated; the animals pulling the most weight or for the greatest distance were judged the strongest.