Which country participated in the Eurovision Song contest in 1957 but absent in 1970 and submitted the song co-written by Sebastian F. Ovens?
Soldiers of Love (Lighthouse X song):  The song represented Denmark in the Eurovision Song Contest 2016, and was written by the band along with Sebastian F. Ovens, Daniel Lund Jørgensen, and Katrine Klith Andersen. Denmark in the Eurovision Song Contest: Denmark has participated in the Eurovision Song Contest 46 times since its debut in 1957. Denmark in the Eurovision Song Contest:  Having competed in ten consecutive contests until 1966, Denmark was absent for eleven consecutive contests from 1967-1977.
Denmark