I want to know the answer to the following question:
Who was Montini's mentor that eventually became a Cardinal?
All the background I'm provided with is that "In 1931, Pacelli appointed him to teach history at the Papal Academy for Diplomats In 1937, after his mentor Giuseppe Pizzardo was named a cardinal and was succeeded by Domenico Tardini, Montini was named Substitute for Ordinary Affairs under Cardinal Pacelli, the Secretary of State under Pope Pius XI.". Is that enough to answer the question?
Answer: yes