Consider the following premises. For all x_3, if x_3 were a poet, then x_3 is an artist. For all x_3, x_3 is a poet or x_3 is not an artist. Can we infer the following from them? For all x_3, if x_3 were a poet, then x_3 is an artist.
That is one of the premises. Therefore, the answer is yes.