CREATE TABLE table_56502 ("Wind farm" CLOB, "Capacity  ( MW ) " FLOAT, "Country" CLOB, "State/Province" CLOB, "Notes" CLOB)

What is the total capacity (MW) of the windfarm located in the state/province of Gansu?
SELECT SUM("Capacity (MW)") FROM table_56502 WHERE "State/Province" = 'gansu'
SELECT SUM("Capacity (MW)") FROM "table_56502" WHERE "State/Province" = 'gansu'