Question: Mansur al-Atrash, was a Syrian politician and journalist, during the period of the United Arab Republic (1958–61), Atrash became a strong supporter of Egyptian president and which pan-Arab leader, who was the second President of Egypt, serving from 1956 until his death?
Sentence (from "Origins of the Six-Day War"): The origins of the Six-Day War, which was fought between June 5 and June 10, 1967 by Israel and the neighboring states of Egypt (known then as the United Arab Republic, UAR), Jordan, and Syria, include both longstanding and immediate issues.
Relevant evidence: No