Assertion: sulfur's state | /r/HasProperty | free
Facets:
Source sentences:
text: Though sulfur can be found in its free state, it is also a by-product of the oil industry.
text: It is encountered in the free state (native sulfur) and in the form of compounds, for example, sulfides, polysulfides, and sulfates.
text: On Earth, sulfur is found in its free state near volcanoes and hot springs.
text: Though sulfur can be found in its free state, it is also a by-product of the oil industry.