Complex sentence: In 2006, Friesacher joined the A1 Grand Prix of nations racing for his home country, Austria for the Mexican Grand Prix, clinching 18th in his first A1 qualifying session.
Split into simpler sentences: In 2006, Friesacher joined the A1 Grand Prix of nations racing for his home country, Austria for the Mexican Grand Prix. He clinched 18th in his first A1 qualifying session.