Question: In the US Senate, in 2012, who replaced an American veterinarian and former politician based in Las Vegas, Nevada?
Sentence (from "United States Senate election in Nevada, 2012"): Incumbent Republican U.S. Senator Dean Heller, who was recently appointed to this seat left vacant by resigning U.S. Senator John Ensign, was narrowly elected to his first full term over Congresswoman Shelley Berkley.
Relevant evidence: Yes