Complex sentence: The submarine was laid down in Flushing at the shipyard of De Schelde under the name of "Luctor et Emergo" on 1 June 1904, as it was not yet certain the Dutch navy would purchase the ship.
Split into simpler sentences: The submarine was laid down in "Flushing" at the shipyard of "De Schelde" under the name of "Luctor et Emergo" on 1 June 1904. As it was not yet certain the Dutch navy would purchase the ship.