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: "What era did the husband of Dorothea of Brandenburg reign?" whose answer is Kalmar Union.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Dorothea of Brandenburg husband reign era
Useful Output:

Doc 1: She was Queen of Denmark, Norway, and Sweden from her marriage to King Christopher III of Denmark, Norway, and Sweden in 1445 until King
Doc 2: Christian and Dorothea were married on October 26, 1449, and two days later, their coronation was held. Eventually, Christian I also became King
Doc 3: She married Heinrich IV. von Mecklenburg on 1 May 1432, in Ludwigslust, Ludwigslust, Mecklenburg-Schwerin, Germany. They were the parents of at least 5 sons and
Doc 4: The Art of Anna Dorothea Therbusch (1721–1782) is not intended as a complete biography nor a catalogue raisonné of the artist; this has been provided by
Doc 5: Dorothea of Brandenburg was Queen of Denmark, Sweden and Norway during the 1400s. Dorothea was probably born around 1430 as the youngest