CREATE TABLE table_31398 ("Competition" CLOB, "Attendance" FLOAT, "Opponent" CLOB, "Season" CLOB, "Result" CLOB)

How many people attended the uefa champions league competition?
SELECT "Attendance" FROM table_31398 WHERE "Competition" = 'UEFA Champions League'
SELECT "Attendance" FROM "table_31398" WHERE "Competition" = 'UEFA Champions League'