Simplify the following text for a Grade 8 native English-speaking person.
Original: Sirenia is a gothic metal band from Stavanger , Norway which incorporates a mixture of gothic metal and symphonic metal , as well as extreme metal and death metal elements .
Simplified: Sirenia is a gothic metal band from Stavanger , Norway , founded in early 2001 . Sirenia play a mix of gothic metal , symphonic metal , extreme metal and death metal sounds .