What is the title of that course?
SELECT title FROM course WHERE course_id IN  ( SELECT T1.prereq_id FROM prereq AS T1 JOIN course AS T2 ON T1.course_id  =  T2.course_id WHERE T2.title  =  'International Finance' ) 
title of the course that is a prerequisite for 'International Finance' refers to selecting the title from the course table where the course_id matches the prereq_id from the prereq table for the course titled 'International Finance';