Complex sentence: A pressure cooker bomb is an improvised explosive device (IED), a type of homemade bomb, made by placing explosive material into a pressure cooker and attaching a blasting cap at the top of the cooker.
Split into simpler sentences: A pressure cooker bomb is an improvised explosive device (IED), a type of homemade bomb. It is made by placing explosive material into a pressure cooker and attaching a blasting cap at the top of the cooker.