Original sentence: The Palestinian Exodus (Arabic: الهجرة الفلسطينية al-Hijra al-Filasteeniya) is the refugee flight of some 711,000 Palestinian Arabs (UN estimate) during the 1948 Arab-Israeli war, and is called the Nakba (Arabic: النكبة), meaning "disaster" or "cataclysm", by Palestinians
Edited sentence: The Palestinian Exodus (Arabic: الهجرة الفلسطينية al-Hijra al-Filasteeniya) is the refugee flight of some 711,000 Palestinian Arabs (UN estimate) during the 1948 Arab-Israeli war, initiated by the Arab countries, and is called the Nakba (Arabic: النكبة), meaning "disaster" or "cataclysm", by Palestinians