Complex sentence: "Lay Down Your Arms" is a 1956 popular song with music by Ake Gerhard and Leon Land and lyrics by Ake Gerhard (original Swedish) and Paddy Roberts (English).
Split into simpler sentences: Lay Down Your Arms is a popular song. The music was written by Ake Gerhard and Leon Land, the lyrics by Ake Gerhard (original Swedish) and Paddy Roberts (English).