Complex sentence: The Jersey Off Road Bicycle Association (JORBA) was formed in 1999 to promote mountain biking in New Jersey, USA, by promoting volunteer efforts, including trail maintenance, sustainable trail building, group rides and skills clinics.
Split into simpler sentences: The Jersey Off Road Bicycle Association (JORBA) is a mountain biking association in New Jersey, USA, founded in 1999. Their activities include trail maintenance, sustainable trail building, group rides and skills clinics.