Assertion: proton | /r/HasProperty | ​2⁄ 3
Facets:
Source sentences:
text: Two up quarks and one down make a proton (​2⁄ 3 + ​2⁄ 3 - ​1⁄ 3 = +1 charge) while two down quarks and one up make a neutron (​2⁄ 3 - ​1⁄ 3 - ​1⁄ 3 = 0 charge).