Consider the following premises. If Linda listens to a song, then Robert is sleeping. For all x_12, x_12 will listen to a song and x_12 is curious. Can we infer the following from them? Robert is sleeping.
 From the fact that for all x_12, x_12 will listen to a song and x_12 is curious we can infer that for all x_12, x_12 will listen to a song. From the fact that for all x_12, x_12 will listen to a song we can infer that Linda is listening to a song. Finally, from the fact that if Linda listens to a song, then Robert is sleeping, and that Linda is listening to a song we can infer that Robert is sleeping. Therefore, the answer is yes.