Consider the following premises. For all x_8, x_8 is a politician and x_8 is sad. For all x_8, if x_8 were a politician, then x_8 is listening to a song. For all x_8, x_8 will climb a mountain. Can we infer the following from them? If we can, name the inference rule being used: For all x_8, x_8 will climb a mountain.
That is one of the premises. Therefore, the answer is yes.