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 "Mansur al-Atrash"): During the presidency of Adib Shishakli (1951–54), he became an anti-government activist and was imprisoned twice, only to be released in an unsuccessful attempt by Shishakli to gain the support of Atrash's father, Sultan.
Relevant evidence: No