Complex sentence: Written by Abdallah "al-Fadhool" Abdulwahab Noman and composed by Ayoob Tarish, it was formerly the anthem of the People's Democratic Republic of Yemen (South Yemen) and became the anthem of all of Yemen when the two Yemens merged in 1990.
Split into simpler sentences: Written by Abdallah "Al-Fadhool" Abdulwahab Noman and composed by Ayoob Tarish. It was formerly the anthem of the People's Democratic Republic of Yemen (South Yemen) but it became the anthem of the whole country when both sides merged together in 1990.