Question: Blast bomb, is a term used in Northern Ireland, for a type of improvised explosive device, a police officer was killed by a blast bomb in Northern Ireland during which ethno-nationalist conflict in Northern Ireland during the late 20th century, by loyalists?
Sentence (from "2004 Grozny stadium bombing"): The explosion was caused by a bomb planted underneath the concrete floor of the VIP podium and occurred at 10:35am during a parade and concert in Groznyy celebrating the 59th anniversary of the victory of Germany in World War 2.
Relevant evidence: No