Consider the following premises. For all x_9, x_9 is a musician or x_9 is not a taxi driver. For all x_9, if x_9 were a musician, then x_9 is an astronaut. There is at least one x_9 for which if x_9 were an astronaut, then x_9 is a taxi driver. Can we infer the following from them? There is at least one x_9 for which if x_9 were a musician, then x_9 is a taxi driver.
 From the fact that for all x_9, x_9 is a musician or x_9 is not a taxi driver we can infer that for all x_9, if x_9 were a taxi driver, then x_9 is a musician. Finally, from the fact that for all x_9, if x_9 were a musician, then x_9 is an astronaut, and that there is at least one x_9 for which if x_9 were an astronaut, then x_9 is a taxi driver we can infer that there is at least one x_9 for which if x_9 were a musician, then x_9 is a taxi driver. Therefore, the answer is yes.