CREATE TABLE table_name_31 (capacity__mw_ INTEGER, turbines VARCHAR(255), size__mw_ VARCHAR(255), wind_farm VARCHAR(255))
What is the sum of the capacities for Carrigh wind warm that has a size of 0.85 MW and more than 3 turbines?
    
SQL: SELECT SUM(capacity__mw_) FROM table_name_31 WHERE size__mw_ = "0.85" AND wind_farm = "carrigh" AND turbines > 3