Question: In which county is this town with a population of about 1,000 as of 2010 and whose residents may attend Messalonskee High School located?
Sentence (from "Groton-Dunstable Regional High School"): While GDRHS is the only public high school located within those communities students from Groton may also attend the public Nashoba Valley Technical High School while students from Dunstable may attend the public Greater Lowell Technical High School.
Relevant evidence: No