Assertion: tornado alley | /r/HasProperty | called by the nickname
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: The tornado alleys in the southeastern U.S., notably the lower Mississippi Valley and the upper Tennessee Valley, are sometimes called by the nickname "Dixie Alley", coined in 1971 by Allen Pearson, former director of the National Severe Storms Forecasting Center (NSSFC).