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: "Gyda of Sweden married the son of who?" whose answer is the son of Ulf Jarl.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Gyda of Sweden marriage
Useful Output:

Doc 1: Gyda (Guda or Gunhild) Anundsdotter of Sweden, (d. 1048 or 1049), was a mediavel Swedish princess and Danish queen, queen consort of King Sweyn
Doc 2: Matching Person details. Spouse, Øystein Hanson Auganes. Birth, 1906 Norway. Death, xxxxx Hordaland, Norway. Browse more like this.
Doc 3: Sweyn married Gyda, daughter of King Anund of Sweden. This may have been part of an agreement to gain Anund's support against Magnus the
Doc 4: Gyda was married to king Sveinn II of Denmark, who had spent some time at the Swedish court during his political exile from Denmark, in about 1047, but she soon
Doc 5: Although minor kings from all over Scandinavia tried to court her, Gyda refused to marry a petty lord. Weak Norwegian kings with only a few