What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? John is playing tennis or David is not running. John is playing a game or David is running. For all x_14, x_14 will play tennis if and only if x_14 will play a game.
If David goes running, then John is playing tennis. For all x_14, if x_14 plays tennis, then x_14 is playing a game. For all x_14, if x_14 plays a game, then x_14 is playing tennis.