Assertion: thorium | /r/CapableOf | become grey
Facets:
Source sentences:
text: However, when it is contaminated with the oxide, thorium slowly tarnishes in air, becoming grey and eventually black.
text: When contaminated with the oxide, thorium slowly tarnishes in air, becoming gray and finally black.
text: When contaminated with the oxide, thorium slowly tarnishes in air, becoming grey and finally black.
text: However, when it is contaminated with the oxide, thorium slowly tarnishes in air, becoming grey and eventually black.
text: However, when it is contaminated with the oxide, thorium slowly tarnishes in air, becoming grey and eventually black.