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 an astronaut, then x_6 is a politician. For all x_6, if x_6 sleeps, then x_6 is a politician. For all x_6, x_6 is an astronaut or x_6 will sleep. There is at least one x_6 for which if x_6 were a politician, then x_6 is a cashier. For all x_6, if x_6 reads a book, then x_6 is a cashier.
There is at least one x_6 for which if x_6 were an astronaut, then x_6 is a cashier. There is at least one x_6 for which if x_6 sleeps, then x_6 is a cashier. For all x_6, x_6 is a politician.