CREATE TABLE table_name_74 (second_vice_president VARCHAR, third_vice_president VARCHAR, inaugurated VARCHAR)
What is Second Vice President, when Third Vice President is "Gen. Juan Alonso", and when Inaugurated is "15 March 1940"?
SELECT second_vice_president FROM table_name_74 WHERE third_vice_president = "gen. juan alonso" AND inaugurated = "15 march 1940"