Assertion: group's officer | /r/HasAspect | the role
Facets:
Source sentences:
text: The Special Patrol Group (SPG) of the Royal Ulster Constabulary was a tactical reserve of 150 officers which had the role: to provide backup in civil commotion, to police sensitive areas at times of confrontation, and to show the flag in a disciplined and impressive way to those who wished to break the peace.