Consider the following premises. For all x_3, x_3 will play squash. Richard is a soldier. Can we infer the following from them? There is at least one x_3 for which x_3 will play squash.
 From the fact that Richard is a soldier we can infer that there is at least one x_3 for which x_3 is a soldier. From the fact that there is at least one x_3 for which x_3 is a soldier, and that for all x_3, x_3 will play squash we can infer that some soldiers will play squash. Finally, from the fact that some soldiers will play squash we can infer that there is at least one x_3 for which x_3 will play squash. Therefore, the answer is yes.