What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_7, if x_7 sleeps, then x_7 is fast. For all x_7, if x_7 were fast, then x_7 is playing tennis. For all x_7, x_7 is not a musician or x_7 will sleep. For all x_7, if x_7 works, then x_7 is playing tennis. For all x_7, x_7 is a musician.
For all x_7, if x_7 sleeps, then x_7 is playing tennis.