Complex sentence: Ellen successfully coaxed the kids into visiting Ron's dental office, and the plans coincided with a $250,000 donation that the family of one of Ellen's students was making to the school, in order for a new library to be built.
Split into simpler sentences: Ellen successfully coaxed the kids into visiting Ron's dental office. The plans coincided with a $250,000 donation that the family of one of Ellen's students was making to the school, in order for a new library to be built.