Original sentence: Njál's saga.The soundtrack of this film featured a song called "Brennunjálssaga" which was composed by the Icelandic New Wave band, Þeyr, and this song later appeared in 1981 when they released their single Iður til Fóta (in the cassette version only)
Edited sentence: Njál's saga, a masterpiece of Medieval Icelandic literature.The soundtrack of this film featured a song called “Brennunjálssaga” which was composed by the Icelandic New Wave band, Þeyr, and this song later appeared in 1981 when they released their single Iður til Fóta (in the cassette version only)