Complex sentence: He started a modest feta-cheese factory in 2002 on the advice of his father; however, his real success came from taking a major risk: purchasing a large defunct yogurt factory in upstate New York in 2005.
Split into simpler sentences: He started a modest feta-cheese factory in 2002 on the advice of his father. Ulukaya purchased a large, defunct yogurt factory in upstate New York in 2005.