user: Question: When did the Summer Olympics occur in Tokyo?
Columns: ['City', 'Country', 'Continent', 'Summer Olympics', 'Winter Olympics', 'Total']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['London', 'United Kingdom', 'Europe', '3 ( 1908 , 1948 , 2012 )', '0', 3.0]
SQL:

assistant: SELECT "Summer Olympics" FROM "Table" WHERE "City" = 'Tokyo';