user: Question: Gross MW of 220, and a Unit of Kakrapar 1 involves what operation start?
Columns: ['Unit', 'Type', 'Gross MW', 'Construction start', 'Operation start']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Phase I', 'Phase I', 'Phase I', 'Phase I', 'Phase I']
SQL:

assistant: SELECT "Operation start" FROM "Table" WHERE "Gross MW" = '220' AND "Unit" = 'Kakrapar 1';