Assertion: volcano's magma | /r/HasProperty | molten rock
Facets:
Source sentences:
text: Magma: Molten rock deep within Earth that consists of liquids, gases, and particles of rocks and crystals.
text: where magma (molten rock) and volcanic gases escape from the volcano's interior.
text: Volcanoes are mountains formed by magma (molten rock) emerging from cracks in the Earth’s thin outer crust.