Title: Separation of church and state in the United States.
Question: What does Walker feel does not impugn the validity of the principle of separation of church and state?

Title: John, King of England.
Question: When did new interpretations of John's reign begin to emerge?

Title: Zhejiang.
Question: What was Nanjing formerly known as?

Title: John, King of England.
Question:
Who captured Richard?