CREATE TABLE table_name_42 (staying_councillors INTEGER, new_council VARCHAR(255), election_result VARCHAR(255), party VARCHAR(255))
How many staying councillors were there when the election result was larger than 0, the new council less than 27 and the party conservatives?
    
SQL: SELECT AVG(staying_councillors) FROM table_name_42 WHERE election_result > 0 AND party = "conservatives" AND new_council < 27