CREATE TABLE table_71500 ("Date" TEXT, "Visitor" TEXT, "Score" TEXT, "Home" TEXT, "Record" TEXT, "Attendance" FLOAT)

What was the average attendance when Chicago Bears were the home team?
SELECT AVG("Attendance") FROM table_71500 WHERE "Home" = 'chicago bears'
SELECT AVG("Attendance") FROM "table_71500" WHERE "Home" = 'chicago bears'