CREATE TABLE table_68274 ("Unit" CLOB, "Type" CLOB, "Gross MW" CLOB, "Construction start" CLOB, "Operation start" CLOB)

Construction start of phase ii has what operation start?
SELECT "Operation start" FROM table_68274 WHERE "Construction start" = 'phase ii'
SELECT "Operation start" FROM "table_68274" WHERE "Construction start" = 'phase ii'