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 for which y will make tea. For all y, if y makes tea, then y is a doctor. For all y, y will listen to a song and y is a sailor.
There is at least one y for which y is a doctor. For all y, y will listen to a song. For all y, y is a sailor.