Question:  The Siege of Tyre was an assault by the founder of what?
Sentence (from "Saladin"): An-Nasir Salah ad-Din Yusuf ibn Ayyub (Arabic: صلاح الدين يوسف بن أيوب‎ ‎ / ALA-LC: "Ṣalāḥ ad-Dīn Yūsuf ibn Ayyūb"; Kurdish: سەلاحەدینی ئەییووبی‎ / ALA-LC: "Selahedînê Eyûbî"), known as Salah ad-Din or Saladin ( ; 11374 March 1193), was the first sultan of Egypt and Syria and the founder of the Ayyubid dynasty.
Relevant evidence: Yes