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 x_9 for which x_9 will read a book if and only if x_9 is a server. For all x_9, if x_9 were a sailor, then x_9 is reading a book. For all x_9, if x_9 were a server, then x_9 is a sailor.
For all x_9, if x_9 were a server, then x_9 is reading a book. There is at least one x_9 for which if x_9 reads a book, then x_9 is a server. There is at least one x_9 for which if x_9 were a server, then x_9 is reading a book.