title: Raw (WWE brand)
context: Raw is a brand of the U.S. based professional wrestling promotion WWE. The brand was first established on March 25, 2002, with a draft on Monday Night Raw and went into effect one week later on April 1. The brand split was discontinued in August 2011, but was brought back in July 2016. Wrestlers assigned to the Raw brand wrestle predominantly on the Raw television program as well as Main Event,  the seasonal Mixed Match Challenge, and Raw branded or co-branded pay-per-view events and WWE Network events. During the first brand split, they also competed on Heat and on ECW under a talent exchange program.
question: When did the WWE Network intorduce the Raw brand?
answers: March 25, 2002