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