...that it's just a simple sentence from a first level grammar method. In this case, the student learns the meaning and use of the ablativus ("from, with, by (means of)") of the noun. The use of a(b) + ablativus usually follows in a later stage of the course. I agree that the word "villa" as used in this sentence is "dangling" there in its ablativus case. Yet, an ablativus separationis would do, although a(b)+ ablativus would, in this case, go as well.