CREATE TABLE table_2146364_2 (second_place VARCHAR, city_ VARCHAR, _nation VARCHAR)

What is the total number of second place finishes when the city & nation was Chicago, USA?
SELECT COUNT(second_place) FROM table_2146364_2 WHERE city_ & _nation = "Chicago, USA"
SELECT COUNT("second_place") FROM "table_2146364_2" WHERE "Chicago, USA" = "city_" & "_nation"