user: Question: What is the Date when Yelena Isinbayeva was the Athlete, with a Record of 4.90m(16ft0¾in)?
Columns: ['Record', 'Athlete', 'Nation', 'Venue', 'Date']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['4.05m(13ft3¼in)', 'Sun Caiyun', 'China', 'Nanjing , China', '21 May 1992']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Athlete" = 'Yelena Isinbayeva' AND "Record" = '4.90m(16ft0¾in)';