Complex sentence: At the beginning of his career Ronaldinho signed a lucrative 10-year deal with American sportswear company Nike, appearing in several commercials, including the 2002 "Secret Tournament" commercial (branded "Scopion KO").
Split into simpler sentences: At the beginning of his career Ronaldinho signed a lucrative 10-year deal with American sportswear company Nike. He has appeared in Nike commercials, including the 2002 "Secret Tournament" commercial (branded "Scopion KO").