What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: There is at least one x_6 for which if x_6 were poor, then x_6 is listening to a song. For all x_6, if x_6 were a bartender, then x_6 is driving a car. For all x_6, x_6 is poor. For all x_6, x_6 is a bartender or x_6 is a mechanic. For all x_6, if x_6 were a mechanic, then x_6 is driving a car.
There is at least one x_6 for which x_6 will listen to a song can be inferred via the existential modus ponens rule. For all x_6, x_6 will drive a car can be inferred via the universal disjunction elimination rule.