Complex sentence: Kansas City barbecue is rubbed with spices, slow-smoked over a variety of woods and served with a thick tomato-based barbecue sauce, which is an integral part of Kansas City barbecue.
Split into simpler sentences: Kansas City barbecue is rubbed with spices, slow-smoked over a variety of woods and served with a thick tomato-based sauce. Barbecue sauce is an integral part of Kansas City barbecue.