<|im_start|>user
Which book of Douglas Hofstadter won the Pulitzer Prize?

Context:
Douglas Richard Hofstadter (born February 15, 1945) is an American scholar of cognitive science, physics, and comparative literature whose research includes concepts such as the sense of self in relation to the external world, consciousness, analogy-making, artistic creation, literary translation, and discovery in mathematics and physics. His 1979 book Gödel, Escher, Bach: An Eternal Golden Braid won both the Pulitzer Prize for general nonfiction and a National Book Award (at that time called The American Book Award) for Science.[note 1] His 2007 book I Am a Strange Loop won the Los Angeles Times Book Prize for Science and Technology.<|im_end|>
<|im_start|>assistant
Douglas Hofstadter's book Gödel, Escher, Bach: An Eternal Golden Braid won the Pulitzer Prize for general nonfiction.<|im_end|>
