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 "Charleston Community Unit School District 1"): Education begins at a prekindergarten level, and those living in the Charleston area attend Mark Twain Elementary School, which prepares early youth for schooling by taking them through prekindergarten and kindergarten under the supervision of principal Terry Diss.
Relevant evidence: No