Assertion: baryon's quark | /r/CapableOf | come in three types
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Source sentences:
text: In the 1960s, the first quark models of elementary particle physics were proposed, which said that protons, neutrons and all other baryons, and also all mesons, are made from fractionally charged particles, the "quarks", which come in three types or "flavors", called up, down, and strange.