Question: What state is the 31st most extensive and the 25th most populous of the 50 United States, where Shreveport is the third largest city and Littleberry Calhoun Allen, Jr was a two-term Democratic mayor?
Sentence (from "Calhoun Allen"): The racially moderate Allen presided over a formerly segregated Shreveport, but there was much unrest in the black community during his tenure.
Relevant evidence: No