Complex sentence: Born to Stu and Helen Hart, Dean Hart began wrestling in his father's Stampede Wrestling promotion along with younger brothers Bret and Owen Hart during the 1970s and 80s and was later associated with Peter Maivia's Hawaii promotion.
Split into simpler sentences: Born to Stu and Helen Hart, Dean Hart began wrestling in his father's Stampede Wrestling promotion along with younger brothers Bret and Owen Hart during the 1970s and 80s. Hart was later associated with Peter Maivia's Hawaii promotion.