What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_1, if x_1 were a poet, then x_1 is a politician. For all x_1, if x_1 were a janitor, then x_1 is a poet. For all x_1, if x_1 were sad, then x_1 is a janitor.
For all x_1, if x_1 were a janitor, then x_1 is a politician. For all x_1, if x_1 were sad, then x_1 is a poet.