Question: Who owns the clift hotel in san francisco?
qaPairs: question: Who first owned the Clift Royal Sonesta Hotel?
answer: Frederick C. Clift
question: Who aquired an interest in the Clift Royal Sonesta Hotel in 1976?
answer: Four Seasons Hotels
question: Who bought the Clift Royal Sonesta Hotel in 1999?
answer: Ian Schrager
question: Who manages the Clift Royal Sonesta Hotel since May 2018?
answer: Sonesta Hotels