Task: Explanation
Input (English): Alan Henning (15 August 1967 – c. 3 October 2014) was an English taxicab driver-turned-volunteer humanitarian aid worker. He was the fourth Western hostage killed by Islamic State of Iraq and the Levant (ISIL) whose killing was publicised in a beheading video. Question: Prominent Imam, Shakeel Begg attempted to secure release of a British taxi driver who became what number of Western hostage killed by the Islamic State?  Answer: the fourth
Output (English):  He was the fourth Western hostage killed by Islamic State of Iraq and the Levant ISIL whose killing was publicised in a beheading video.