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: "Guelphs and Ghibellines supported the Pope during which time frame?" whose answer is 9th and 15th centuries.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Guelphs and Ghibellines time period
Useful Output:

Doc 1: Guelf and Ghibelline, members of two opposing factions in German and Italian politics during the Middle Ages.
Doc 2: Guelphs and Ghibellines were the two opposing factions in Italian politics in the late Middle Ages, particularly from the 12th century until
Doc 3: The terms Guelph and Ghibelline appeared in Florence around 1240. They then spread to Tuscany and throughout Italy.
Doc 4: In Florence, the Guelph and Ghibelline parties were first introduced in 1215. In that year, a nobleman named Buondelmonte dei Buondelmonti had
Doc 5:  during these challenging times. Whether you attend our Wednesday Lectures series in person at Palazzo Lanfredini, or online through Zoom and