Complex sentence: The flag of the Federal Republic of Yugoslavia was adopted on April 27,1992 which officially became theflag of State Union of Serbia and Montenegro in 2003 and remained in use until the country's dissolution in 2006.
Split into simpler sentences: The flag of Federal Republic of Yugoslavia was adopted on April 27,1992. After FR Yugoslavia's reorganization into the State Union of Serbia and Montenegro the flag continued to be used until the Union's dissolution in 2006.