What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, if x_12 plays a game, then x_12 is running. For all x_12, x_12 is a sailor or x_12 will play a game. For all x_12, if x_12 goes running, then x_12 is playing a game. For all x_12, x_12 will go running if and only if x_12 will play tennis. There is at least one x_12 for which x_12 is not a sailor or x_12 will play tennis.
There is at least one x_12 for which x_12 will play a game or x_12 will play tennis. For all x_12, x_12 will play a game if and only if x_12 will go running. For all x_12, x_12 will go running if and only if x_12 will play a game. For all x_12, if x_12 goes running, then x_12 is playing tennis. For all x_12, if x_12 plays tennis, then x_12 is running.