"A riot is a form of civil disorder commonly characterized by a group lashing out in a violent public disturbance against authority, property, or people. Riots typically involve destruction of property, public or private. The property targeted varies depending on the riot and the inclinations of those involved. Targets can include shops, cars, restaurants, state-owned institutions, and religious buildings."

• Wikipedia entry for "riot"

resolves to 'YES' if a riot occurs in Chicago that is directly linked to anti-immigrant sentiment.