What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, if x_6 were a taxi driver, then x_6 is a janitor. For all x_6, if x_6 plays tennis, then x_6 is an artist. For all x_6, if x_6 were a janitor, then x_6 is sleeping. There is at least one x_6 for which if x_6 sleeps, then x_6 is playing tennis.
For all x_6, if x_6 were a taxi driver, then x_6 is sleeping. There is at least one x_6 for which if x_6 sleeps, then x_6 is an artist. There is at least one x_6 for which if x_6 were a janitor, then x_6 is playing tennis.