Lamprechtsofen
... that Lamprechtsofen was the deepest known cave on Earth for less than three years?
... that <b id="mwCuc"><a href="./Lamprechtsofen" id="mwCug" rel="mw:WikiLink" title="Lamprechtsofen">Lamprechtsofen</a></b> was the deepest known <a href="./Cave" id="mwCuk" rel="mw:WikiLink" title="Cave">cave</a> on Earth for less than three years?