Consider the following premises. If Sarah were sad, then James is drinking water. If James drinks water, then it is raining. For all x_15, if x_15 were sad, then x_15 is a nurse. For all x_15, if x_15 were a nurse, then x_15 is sad. Can we infer the following from them? If Sarah were a nurse, then it is raining.
 From the fact that for all x_15, if x_15 were a nurse, then x_15 is sad, and that for all x_15, if x_15 were sad, then x_15 is a nurse we can infer that for all x_15, x_15 is a nurse if and only if x_15 is sad. From the fact that for all x_15, x_15 is a nurse if and only if x_15 is sad we can infer that for all x_15, if x_15 were a nurse, then x_15 is sad. From the fact that for all x_15, if x_15 were a nurse, then x_15 is sad we can infer that if Sarah were a nurse, then Sarah is sad. From the fact that if Sarah were sad, then James is drinking water, and that if James drinks water, then it is raining we can infer that if Sarah were sad, then it is raining. Finally, from the fact that if Sarah were a nurse, then Sarah is sad, and that if Sarah were sad, then it is raining we can infer that if Sarah were a nurse, then it is raining. Therefore, the answer is yes.