Complex sentence: Frankenreiter took up surfing as a teenager on the beaches of San Clemente, California, and was eventually signed to a sponsorship deal with the Australian-based Billabong clothing company which allowed him to travel the world over.
Split into simpler sentences: Frankenreiter took up surfing as a teenager on the beaches of San Clemente, California. He eventually signed a sponsorship deal with the Australian-based Billabong clothing company, which allowed him to travel the world over.