user: Question: Which source date has an Internet Explorer usage of 60.2%?
Columns: ['Date', 'Internet Explorer', 'Firefox', 'Opera', 'Safari', 'Source']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['June 2010', '53.8%', '30.6%', '2.4%', '6.8%', '2010-6']
SQL:

assistant: SELECT "Source" FROM "Table" WHERE "Internet Explorer" = '60.2%';