Title: Institute of technology.
Question: In what year was the City Polytechnic of Hong Kong founded?

Title: Czech language.
Question: What are inflected for number in Czech?

Title: Anti-aircraft warfare.
Question: When did Serbian troops notice enemy aircraft approaching Kragujevac?

Title: American Idol.
Question:
At what point during season 9 of American Idol did Ellen Degeneres become a judge?