Consider the following premises. For all y_2, y_2 will drink water. For all y_2, y_2 is a musician. There is at least one y_2 for which y_2 is a soldier. Can we infer the following from them? If we can, name the inference rule being used: Some soldiers will drink water.
 From the fact that for all y_2, y_2 will drink water, and that for all y_2, y_2 is a musician we can infer that for all y_2, y_2 will drink water and y_2 is a musician via universal conjunction. From the fact that for all y_2, y_2 will drink water and y_2 is a musician we can infer that for all y_2, y_2 will drink water via universal simplification. Finally, from the fact that there is at least one y_2 for which y_2 is a soldier, and that for all y_2, y_2 will drink water we can infer that some soldiers will drink water via existential conjunction. Therefore, the answer is yes.