Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| City | Country | Continent | Summer Olympics | Winter Olympics | Total |
| --- | --- | --- | --- | --- | --- |
| London | United Kingdom | Europe | 3 ( 1908 , 1948 , 2012 ) | 0 | 3.0 |
| Athens | Greece | Europe | 2 ( 1896 , 1906 [f ], 2004 ) | 0 | 3.0 |
| Tokyo | Japan | Asia | 2 ( 1964 , 2020 ) | 0 | 2.0 |
| Paris | France | Europe | 2 ( 1900 , 1924 ) | 0 | 2.0 |
| Los Angeles | United States | North America | 2 ( 1932 , 1984 ) | 0 | 2.0 |
| Lake Placid | United States | North America | 0 | 2 ( 1932 , 1980 ) | 2.0 |
| Innsbruck | Austria | Europe | 0 | 2 ( 1964 , 1976 ) | 2.0 |
| St. Moritz | Switzerland | Europe | 0 | 2 ( 1928 , 1948 ) | 2.0 |
Question:
When did the Summer Olympics occur in Tokyo?
Answer:
2 ( 1964 , 2020 )