Complex sentence: In the 1950s, he moved to study Arabic language at the Al-Azhar University, he be-friended of a young engineering student named Yasser Arafat (known as Abu Ammar) who became the militant head of the fledgling Association of Palestinian Students.
Split into simpler sentences: In the 1950s, he moved to study Arabic language at the Al-Azhar University. He befriended a young engineering student named Yasser Arafat (known as Abu Ammar) who became the head of the fledgling Association of Palestinian Students.