Question: Egbert B. Gebstadter is a fictional author who appears in the indexes of books written by an American professor who was born in what year?
Sentence (from "Douglas Hofstadter"): Douglas Richard Hofstadter (born February 15, 1945) is an American professor of cognitive science whose research focuses on the sense of "I" (sense of self in relation to the external world), consciousness, analogy-making, artistic creation, literary translation, and discovery in mathematics and physics.
Relevant evidence: Yes