Assertion: matter | /r/HasProperty | quark
Facets:
Source sentences:
text: One may use a definition that matter is atoms, or that matter is hadrons, or that matter is leptons and quarks depending upon the scale at which one wishes to define matter.
text: The protons and neutrons that make up atoms are made of even smaller things called quarks (which are "glued" together by things called "gluons").