CREATE TABLE table_name_31 (mrc_championships INTEGER, solo VARCHAR(255), pct VARCHAR(255), co_champions VARCHAR(255))
What is the average value of MRC Championships with more than 0.685 PCT., more than 1 for co-champions, and less than 5 solo?
    
SQL: SELECT AVG(mrc_championships) FROM table_name_31 WHERE pct > 0.685 AND co_champions > 1 AND solo < 5