CREATE TABLE table_name_17 (year_opened INT, track_name VARCHAR, seating VARCHAR)

What is the year opened for Chicagoland Speedway with a seating smaller than 75,000?
SELECT AVG(year_opened) FROM table_name_17 WHERE track_name = "chicagoland speedway" AND seating < 75 OFFSET 000
SELECT AVG("year_opened") FROM "table_name_17" WHERE "chicagoland speedway" = "track_name" AND "seating" < 75 OFFSET 000