Consider the following premises. For all x_9, x_9 will not listen to a song. For all x_9, x_9 will listen to a song or x_9 will take a plane. For all x_9, x_9 is a musician and x_9 is poor. Can we infer the following from them? Robert is a musician.
 From the fact that for all x_9, x_9 will listen to a song or x_9 will take a plane, and that for all x_9, x_9 will not listen to a song we can infer that for all x_9, x_9 will take a plane. From the fact that for all x_9, x_9 is a musician and x_9 is poor we can infer that for all x_9, x_9 is a musician. From the fact that for all x_9, x_9 is a musician, and that for all x_9, x_9 will take a plane we can infer that for all x_9, x_9 is a musician and x_9 will take a plane. From the fact that for all x_9, x_9 is a musician and x_9 will take a plane we can infer that Robert is a musician and Robert is taking a plane. Finally, from the fact that Robert is a musician and Robert is taking a plane we can infer that Robert is a musician. Therefore, the answer is yes.