Complex sentence: She was purchased by the Columbia Yacht Club in Chicago, Illinois who were not permitted by city ordinances to construct a clubhouse on the waterfront, therefore the club decided to purchase the MV "Abby" and permanently moor her at their facility.
Split into simpler sentences: She was purchased by the Columbia Yacht Club in Chicago, Illinois. Chicago city ordinances barred the club from constructing a clubhouse on the waterfront, so the club decided to purchase the MV "Abby" and permanently moor her at their facility.