What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_5, if x_5 were an office clerk, then x_5 is reading a book. For all x_5, x_5 is an artist. For all x_5, if x_5 were an artist, then x_5 is an office clerk. For all x_5, if x_5 reads a book, then x_5 is a taxi driver.
For all x_5, x_5 is an office clerk. For all x_5, if x_5 were an office clerk, then x_5 is a taxi driver. For all x_5, if x_5 were an artist, then x_5 is reading a book.