Assertion: racing's race | /r/HasProperty | part of a specific discipline
Facets:
value: in the a.m.a. grand national championship
type: LOCATION
value: mile, half-mile
type: OTHER
Source sentences:
text: In the A.M.A. Grand National Championship, mile, half-mile, short-track and TT races are part of a specific discipline labelled "Dirt track" or sometimes "Flat track" (also called Flat Track).