user: Question: What is Calvin Mokoto's average rank?
Columns: ['Rank', 'Athletes', 'Country', 'Time', 'Notes']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'David Cal', 'Spain', '3:58.756', 'QF']
SQL:

assistant: SELECT AVG("Rank") FROM "Table" WHERE "Athletes" = 'Calvin Mokoto';