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: "Who was the second wife Sigismund I the Old, the King of Poland and Grand Duke of Lithuania and mother of Anna Jagiellon?" whose answer is Bona Sforza.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Sigismund I the Old second wife and mother of Anna Jagiellon
Useful Output:

Doc 1: 16-year-old Elizabeth married 22-year-old Sigismund Augustus, whom she met for the first time shortly before marriage vows.
Doc 2: Sigismund Augustus was born in Kraków on 1 August 1520 to Sigismund I the Old and his wife, Bona Sforza of Milan.
Doc 3: Katarina Jagellonica of Poland was the first of the two wives of Johan III, King of Sweden. Born on November 1, 1526, in Kraków, Poland.
Doc 4: Hedwig Jagiellon, Electress of Brandenburg · Sigismund II Augustus · Sophia Jagiellon, Duchess of Brunswick-Lüneburg · Anna Jagiellon · Catherine Jagellon · Anna
Doc 5: The last days of Sigismund's life were adumbrated by a sad message: The young king, Sigismund II Augustus, secretly married his mistress, Barbara Radziwill.