What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y_4, y_4 is a nurse and y_4 will read a book. For all y_4, y_4 is sad. There is at least one y_4 for which y_4 is a soldier.
For all y_4, y_4 is a nurse. For all y_4, y_4 will read a book. There is at least one y_4 for which y_4 is a soldier and y_4 is sad. There is at least one y_4 for which y_4 is sad and y_4 is a soldier.