Question: William F Romain led a team in an investigation a effigy mound in Adams County, Ohio, that is how long?
Sentence (from "Serpent Mound"): The Great Serpent Mound is a 1348 ft -long, three-foot-high prehistoric effigy mound on a plateau of the Serpent Mound crater along Ohio Brush Creek in Adams County, Ohio.
Relevant evidence: Yes