Consider the following premises. For all x_6, x_6 is a taxi driver. For all x_6, x_6 will go running. Can we infer the following from them? There is at least one y_2 for which y_2 will go running.
 From the fact that for all x_6, x_6 will go running, and that for all x_6, x_6 is a taxi driver we can infer that for all x_6, x_6 will go running and x_6 is a taxi driver. From the fact that for all x_6, x_6 will go running and x_6 is a taxi driver we can infer that for all x_6, x_6 will go running. From the fact that for all x_6, x_6 will go running we can infer that Linda is running. Finally, from the fact that Linda is running we can infer that there is at least one y_2 for which y_2 will go running. Therefore, the answer is yes.