Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: Seven members of the Aum Shinrikyo doomsday cult which carried out a deadly chemical attack on the Tokyo underground in 1995 have been executed, including cult leader Shoko Asahara.

Tokyo Sarin attack: Aum Shinrikyo cult leaders executed