Assertion: lepton | /r/DistinctFrom | other known family of fermions
Facets:
Source sentences:
text: They are a family of particles that are different from the other known family of fermions, the quarks.
text: They are a family of particles that are different from the other known family of fermions, the quarks.
text: They are a family of particles that are different from the other known family of fermions, the quarks.