question: Robert A. Lewis was the co-pilot of the Superfortress bomber that was named after whose mother?
answer: Colonel Paul Tibbets
context: Title: Robert A. Lewis
  Passage: Robert Alvin Lewis (October 18, 1917 – June 18, 1983) was a United States Army Air Forces officer serving in the Pacific Theatre during World War II.  He was the co-pilot of the "Enola Gay", the B-29 Superfortress bomber which dropped the atomic bomb Little Boy on the Japanese city of Hiroshima on 6 August 1945.
  Title: Michael J. Novosel
  Passage: Michael J. Novosel Sr. (September 3, 1922 – April 2, 2006) of Enterprise, Alabama served in the United States military during three wars: World War II, the Korean War and the Vietnam War.  He flew the B-29 Superfortress bomber in World War II.  In order to serve in the Vietnam War, he gave up the rank of lieutenant colonel in the Air Force Reserve to become a chief warrant officer in the Army.  For his bravery in conducting a medical evacuation under fire in this conflict, he was awarded the United States' highest military decoration, the Medal of Honor.
  Title: Enola Gay
  Passage: The Enola Gay ( ) is a Boeing B-29 Superfortress bomber, named for Enola Gay Tibbets, the mother of the pilot, Colonel Paul Tibbets, who selected the aircraft while it was still on the assembly line.  On 6 August 1945, during the final stages of World War II, it became the first aircraft to drop an atomic bomb.  The bomb, code-named "Little Boy", was targeted at the city of Hiroshima, Japan, and caused unprecedented destruction.  "Enola Gay" participated in the second atomic attack as the weather reconnaissance aircraft for the primary target of Kokura.  Clouds and drifting smoke resulted in a secondary target, Nagasaki, being bombed instead.
citations: Robert A. Lewis Enola Gay