original: In 1963, Haile Selassie presided over the establishment of the Organisation of African Unity, with the new organization establishing its headquarters in Addis Ababa.
simplifications: Haile Selassie presided over the establishment of the Organisation of African Unity in 1963, with the new organization establishing its headquarters in Addis Ababa. In 1963, Haile Selassie was a leader of the Organisation of African Unity. The new organization opened its headquarters in Addis Ababa. Haile Selassie presided over the Organisation of African Unity and established its headquarters in Addis Ababa. Haile Selassie oversaw the building of the Organisation of African Unity in 1963. The headquarters are in Addis Ababa. In 1963, Haile Selassie led the creation of the Organisation of African Unity. The new organization set up its headquarters in Addis Ababa. In 1963, Haile Selassie led the creation of the Organisation of African Unity. Its headquarters was in Addis Ababa. In 1963, Haile Selassie led the establishment of the Organization of African Unity. Haile Selassie was the president of the Organization of African Unity in 1963. Their headquarters is at Addis Ababa. Haile Selassie was in charge of the Organisation of African Unity in 1963. The organizations's headquaters was established in Addis Ababa. In 1963, Haile Selassie oversaw the setting up of the Organisation of African Unity, with the new organization setting up its headquarters in Addis Ababa.