CREATE TABLE table_42981 ("Name" TEXT, "Location" TEXT, "Field" TEXT, "Capacity  ( MW ) " FLOAT, "Annual Generation  ( average GWh ) " TEXT, "Commissioned" TEXT)

What is the Name of the power station in the Field of Mokai?
SELECT "Name" FROM table_42981 WHERE "Field" = 'mokai'
SELECT "Name" FROM "table_42981" WHERE "Field" = 'mokai'