Title: Carnival.
Question: On which month and day did Saturnalia start?

Title: Separation of church and state in the United States.
Question: What do some debates center on the law of the land not being just defined by the Constitution's Supremacy Clause but also by what?

Title: Switzerland.
Question: When did Switzerland sign the Kyoto Protocol?

Title: Portugal.
Question:
In which year did Brazel become independent?