Title: Alaska.
Question: What year was the Alaska Railroad built?

Title: Antenna (radio).
Question: A measure of the power that is useable and the power absorbed by the terminals?

Title: The Legend of Zelda: Twilight Princess.
Question: What is the only known gateway between Twilight Realm & Hyrule?

Title: History of India.
Question:
In which century did the Gupta Empire fall?