Complex sentence: Yadollah started his music activity for public in 1970 when he met musicians in the Kermanshah Radio then he recorded his first song Separation هیجران with radio's music band in 1970.
Split into simpler sentences: Yadollah started his music activity for public in 1970 when he met musicians in the Kermanshah Radio. His first song Separation هیجران was recorded with radio's music band in 1970.