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: "Hailing from different countries and styles, both Sigur Rós and Bayside perform under what same main genre?" whose answer is rock.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Sigur Rós genre and Bayside genre
Useful Output:

Doc 1: In their nearly 30 years as a band, they have created a style, a language (literally, it's called 'Hopelandic'), and a genre entirely their own,
Doc 2: Sigur Rós is very significant in the post-rock genre is connected with their innovative use of instruments such as bowed guitar, pitched percussion instruments
Doc 3: Sigur Rós is an Icelandic post-rock band that formed in 1994 in Reykjavík. It comprises lead vocalist and guitarist Jón Þór "Jónsi" Birgisson, bassist Georg
Doc 4: Sigur Ros is partly Ambient, and I'd say some of their music is more Ambient than Post-Rock, but the fact that they use Rock instruments to
Doc 5: an Album by Sigur Rós. Released on 29 October 2002 by Krunk in Iceland. Genres: Alternative, Rock, Electronic, Abstract, Ambient, Experimental, Indie Rock,