Assertion: muon | /r/HasProperty | classed as meson
Facets:
value: originally
type: OTHER
value: because of its
type: CAUSE
Source sentences:
text: The muon was originally classed as a meson
text: The muon was originally classed as a meson because of its mass, about 200 times that of the electron, but the subsequent reclassification of particles on the basis of their behavior placed it with the electron in the lepton category.
text: The muon was originally classed as a meson
text: The muon was originally classed as a meson