Consider the following premises. There is at least one x_2 for which if x_2 drinks water, then x_2 is happy. For all x_2, x_2 is a taxi driver. For all x_2, x_2 will drink water. Can we infer the following from them? There is at least one x_2 for which x_2 is a taxi driver and x_2 is happy.
 From the fact that there is at least one x_2 for which if x_2 drinks water, then x_2 is happy, and that for all x_2, x_2 will drink water we can infer that there is at least one x_2 for which x_2 is happy. Finally, from the fact that for all x_2, x_2 is a taxi driver, and that there is at least one x_2 for which x_2 is happy we can infer that there is at least one x_2 for which x_2 is a taxi driver and x_2 is happy. Therefore, the answer is yes.