Complex sentence: Winkelman was the only person in Milton Keynes publicly associated with the project; his financial supporters, later revealed to be Asda (a subsidiary of Walmart) and IKEA, were kept strictly anonymous.
Split into simpler sentences: Winkelman was the only person in Milton Keynes publicly associated with the project. His financial supporters, later revealed to be Asda (a subsidiary of Walmart) and IKEA, were kept strictly anonymous.