Assertion: watermelon's rind | /r/HasProperty | tough
Facets:
Source sentences:
text: The rind of a ripe watermelon is tough and resists marking while an immature watermelon is easy to scrape.
text: By the early 1900s, however, watermelons had been developed with hard, thick skins and tough rinds at the sacrifice of flavor, which were ultimately more profitable because they were able to be shipped with very little breakage.