The conversation between human and AI assistant.
[|Human|] What is the tallest building in the city of San Francisco?
[|AI|] Salesforce Tower is a 61-story skyscraper at 415 Mission Street, between First and Fremont Street, in the South of Market district of downtown San Francisco. The building is 1,070 feet (326 m) tall, with a top roof height of 970 feet (296 m).
[|Human|] 
What is the tallest building in the city of San Francisco?