Question: How large is the shipyard where the USS Mahan was built ?
Sentence (from "USS Pocahontas (1852)"): She was originally commissioned as USS "Despatch — the second U.S. Navy ship of that name — on 17 January 1856, with Lieutenant T. M. Crossan in command, and was recommissioned and renamed in 1860, seeing action in the American Civil War.
Relevant evidence: No