You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Prince Axel of Denmark was a cousin of the King of Greece, who ruled during what years?" whose answer is 1913 to 1917 and from 1920 to 1922.
Each document should contain about 30 words, and these documents should contain useful information.

Query: King of Greece during the 20th century
Useful Output:

Doc 1: King George I (reigned 1863–1913), of the House of Schleswig-Holstein-Sonderburg-Glücksburg, and only Greece's second monarch, controlled the
Doc 2: Constantine II, the last king of the Hellenes, who has died aged 82, led a comfortable life in exile after a brief and turbulent reign.
Doc 3: King Constantine II: The Last Monarch Of Greece | A King's Story | Real Royalty · Comments3.3K.
Doc 4: Constantine II (2 June 1940 - 23 January 2023) reigned as king of Greece, from 6 March 1964 until the abolition of the monarchy on 1 June 1973.
Doc 5: King Constantine I, a brave army officer but rather controversial in his political choices, is mainly known for his strong disagreement with Prime Minister