In the following paragraph, determine if the numbered sentences are run-on sentences or not.

Legends of everyday horrors last for generations. (1) Although many people tell the tale of the psychopath's hook left dangling on the door handle, nobody has ever produced any evidence that it really happened. (2) Probably because of its pathos, the story of the dog tied to the car bumper still survives it was immortalized in the movie National Lampoon's Vacation. A famous academic legend involves the philosophy examination question, "Why?" and the student's response, "Why not?" (3) This story and its variations all end the same way, the professor, appreciating creativity, gives the student an A.