Instruct: Given a premise, retrieve a hypothesis that is entailed by the premise.
Query: In a separate mass shooting on Saturday in Pittsburgh, a man donned a bulletproof vest and killed three police officers after he had been driven into a murderous rage by an argument with his mother over a dog.  According to court papers, Richard Poplawski — who had recently been dishonourably discharged from the US Marines — had been arguing with his mother about the dog urinating inside their home early on Saturday morning when she threatened to evict him. When the argument escalated, she called the police. By the time a patrol car turned up at after 7am, Mr Poplawski, 23, had armed himself with an assault rifle, a long-arm rifle, a pistol and several rounds of ammunition.
The Poplawski shooting was not the only shooting that occurred on Saturday.
The soldiers fired pistols at the Iraqi police.
Kevin Pech used the loaded handgun to commit a crime.
The guy arrested during the drug bust had an assault rifle next to him.
The stray bullet was fired by a former military firearm.
More than one officer was shot.
Ian Rapoport is a suspect in an alleged domestic violence incident that took place over the weekend.
The stray bullet was fired by a rifle.
There was a shooting last Friday.
Violence has persisted for several days.
The man attacked police before attacking another man who was walking a dog.
Some of the victims were related to the shooter
The gunman is a psycopath
there was a fatality involving weapons
There were warnings of gunfire before the shooting incident started
A man was shot during a domestic call.
Armed officers shot him with undisclosed guns.
violence had erupted during the event
The officers are sure there's a third possible shooter.
The victim was shot at a house.
The police officer was shot
The shooter was a police officer for 30 years.
The mother is at fault here
The mother and the dog is the sole reason for this rampage
The bulletproof vest that richard had on was made a kevlar and polymer blend.