CREATE TABLE table_43006 ("Pos." CLOB, "Nationality" CLOB, "Previous team" CLOB, "NBA years [a ]" FLOAT, "Career with the franchise [b ]" CLOB)

What is the previous team of the United States player who had 2 NBA years and played the F position?
SELECT "Previous team" FROM table_43006 WHERE "Nationality" = 'united states' AND "NBA years [a ]" = '2' AND "Pos." = 'f'
SELECT "Previous team" FROM "table_43006" WHERE "NBA years [a ]" = '2' AND "Nationality" = 'united states' AND "Pos." = 'f'