Nagato-class battleships
... that the Nagato-class battleships were the first dreadnoughts to be launched with guns larger than 15 inches (381 mm) even though they were not the first to be laid down?
... that the <b id="mwCuE"><a href="./Nagato-class_battleship" id="mwCuI" rel="mw:WikiLink" title="Nagato-class battleship"><i id="mwCuM">Nagato</i>-class battleships</a></b> were the first <a href="./Dreadnought" id="mwCuQ" rel="mw:WikiLink" title="Dreadnought">dreadnoughts</a> to be <a class="mw-redirect" href="./Ship_naming_and_launching" id="mwCuU" rel="mw:WikiLink" title="Ship naming and launching">launched</a> with guns larger than <span about="#mwt41" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"15"},"2":{"wt":"in"},"3":{"wt":"0"}},"i":0}}]}' id="mwCuY" typeof="mw:Transclusion">15 inches (381</span><span about="#mwt41" typeof="mw:Entity"> </span><span about="#mwt41">mm)</span> even though they were not the first to be <a href="./Keel_laying" id="mwCuc" rel="mw:WikiLink" title="Keel laying">laid down</a>?