What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one y_4 for which y_4 will not climb a mountain. For all y_4, y_4 will take a plane. For all y_4, y_4 is a musician. For all y_4, y_4 will climb a mountain or y_4 will sleep.
There is at least one y_4 for which y_4 will sleep. For all y_4, y_4 will take a plane and y_4 is a musician. For all y_4, y_4 is a musician and y_4 will take a plane.