Consider the following premises. For all x_8, if x_8 drives a car, then x_8 is listening to a song. For all x_8, x_8 is a janitor or x_8 will take a plane. For all x_8, if x_8 takes a plane, then x_8 is driving a car. There is at least one x_8 for which x_8 is a janitor if and only if x_8 will listen to a song. Can we infer the following from them? There is at least one x_8 for which x_8 will listen to a song.
 From the fact that there is at least one x_8 for which x_8 is a janitor if and only if x_8 will listen to a song we can infer that there is at least one x_8 for which if x_8 were a janitor, then x_8 is listening to a song. From the fact that for all x_8, if x_8 takes a plane, then x_8 is driving a car, and that for all x_8, if x_8 drives a car, then x_8 is listening to a song we can infer that for all x_8, if x_8 takes a plane, then x_8 is listening to a song. Finally, from the fact that there is at least one x_8 for which if x_8 were a janitor, then x_8 is listening to a song, that for all x_8, if x_8 takes a plane, then x_8 is listening to a song, and that for all x_8, x_8 is a janitor or x_8 will take a plane we can infer that there is at least one x_8 for which x_8 will listen to a song. Therefore, the answer is yes.