Assertion: dark matter | /r/HasProperty | substance
Facets:
Source sentences:
text: Dark matter is a substance which was undetectable via the use of normal sensors, and which was thought to make up the majority of the universe's mass.
text: In His Dark Materials, dark matter (introduced as Dust in Lyra's world) is a central part of the trilogy, and is the substance that angels are made up of.
text: Dark matter is a substance that was widely used as starship fuel in the 30th and 31st centuries.
text: The dark matter is a substance of which little is known.
text: The Dark Matter that I produce is a substance that does not exist in this world.