Title: Dissolution of the Soviet Union.
Question: What was Yeltsin president of?

Title: New York City.
Question: Who owns the trademark to I ❤️ NY?

Title: Separation of church and state in the United States.
Question: When do Jeffries and Ryan that the modern concept of separation of church and state dates from?

Title: Portugal.
Question:
What were the governors of the taifas called?