Consider the following premises. For all x_10, x_10 will sleep. For all x_10, if x_10 makes tea, then x_10 is taking a plane. There is at least one x_10 for which x_10 will make tea. Can we infer the following from them? There is at least one x_10 for which x_10 will take a plane.
 From the fact that there is at least one x_10 for which x_10 will make tea, and that for all x_10, x_10 will sleep we can infer that there is at least one x_10 for which x_10 will make tea and x_10 will sleep. From the fact that there is at least one x_10 for which x_10 will make tea and x_10 will sleep we can infer that there is at least one x_10 for which x_10 will make tea. Finally, from the fact that for all x_10, if x_10 makes tea, then x_10 is taking a plane, and that there is at least one x_10 for which x_10 will make tea we can infer that there is at least one x_10 for which x_10 will take a plane. Therefore, the answer is yes.