Complex sentence: Mexico's first official test match, and first participation in Rugby World Cup qualifying, occurred in March 2008, was a 47-7 victory over Saint Vincent and the Grenadines national rugby union team in 2011 Rugby World Cup qualifying.
Split into simpler sentences: Mexico's first official test match, and first participation in Rugby World Cup qualifying, was in March 2008. In that match, Mexico secured a 47-7 victory over Saint Vincent and the Grenadines national rugby union team in 2011 Rugby World Cup qualifying.