Question: Who is Abdallah Ibn Abd Al-Malik's paternal grandfather?
Sentence (from "Abd al-Malik ibn Marwan"): Following a failed invasion of Iraq in 686, Abd al-Malik focused on securing Syria before making further attempts to conquer the greater part of the Caliphate from his principal rival, the Mecca-based caliph Abd Allah ibn al-Zubayr.
Relevant evidence: No