CREATE TABLE table_27126 ("Wind farm" CLOB, "Installed capacity  ( MW ) " CLOB, "Turbine Manufacturer" CLOB, "County" CLOB, "Date in Service" CLOB)

How many turbine manufacturers installed a capacity of 189 MW?
SELECT COUNT("Turbine Manufacturer") FROM table_27126 WHERE "Installed capacity (MW)" = '189'
SELECT COUNT("Turbine Manufacturer") FROM "table_27126" WHERE "Installed capacity (MW)" = '189'