The following events occurred in a Model Penal Code jurisdiction.
City Park is a sunny public park where college students from Model State U hang out.
Shadyvale Retreat House, a private organization with large, shady grounds, is across the street. For many years students spilled over from the park onto the grounds as if they were part of the park without objection from the owners of the Retreat House. Two months ago the new owners began a campaign to keep everyone but guests of the Retreat House off the grounds. Last weekend Andy and Betty, two Model State U students, and Betty's friend Carla, who was visiting from out of town, went to City Park to play Frisbee. After a couple of hours, Andy and Betty realized that Carla wasn't feeling well, and they decided to carry her across the street to the cool, shady Retreat House grounds.