Question: What's the highest lowest number of capacity that ibrox stadium has when the average is larger than 49143?
SQL: SELECT MAX("Lowest") FROM "2-11208143-9" WHERE "Stadium" = 'ibrox stadium' AND "Average" > 49143.0;

Question: What's the lowest highest capacity that has a lowest capacity larger than 4086 people, and a current capacity of 14209, and an average capacity smaller than 8530?
SQL: SELECT MIN("Highest") FROM "2-11208143-9" WHERE "Lowest" > 4086.0 AND "Capacity" = 14209.0 AND "Average" < 8530.0;