Simplify the following text for a Grade 9 native English-speaking person.
Original: It was established as a second title for tag teams in WWE in 2002 to complement the original World Tag Team Championship . Both titles were unified in 2009 and were collectively referred to as the Unified WWE Tag Team Championship while essentially remaining independently active until the World Tag Team Championship was decommissioned in 2010 .
Simplified: For the original WWE Tag Team Championship that was active from 1971 through 2010 , see World Tag Team Championship ( WWE ) .