WARSAW, Poland (AP) — A Polish mining academy says its experts are analyzing data gathered from a site allegedly hiding a Nazi train, which local lore says is laden with gold.Spokesman Bartosz Dembinski of the Krakow University of Science and Technology could not confirm to The Associated Press whether the data obtained last week suggested the existence of a train in an underground tunnel in Walbrzych, in southwestern Poland.The experts used magnetic, gravitation and earth-penetrating equipment to check a railway bank that, according to explorers, is hiding a secret tunnel and a World War II Nazi train.