Question: Who was the Senator behind the corporation that served as the model for the Helmand and Arghandab Valley Authority?
Sentence (from "Helmand and Arghandab Valley Authority"): The agency was modelled on the Tennessee Valley Authority in the United States, with a remit covering lands in Farah Province, Ghazni Province, Helmand Province, Herat Province, and Kandahar Province.
Relevant evidence: Yes