Complex sentence: British Army Dirigible No 1, christened "Nulli Secundus" (Latin: "Second to none") was a Semi-rigid airship, first flown on 10 September 1907 to become Britain's first powered military aircraft.
Split into simpler sentences: British Army Dirigible No 1, christened "Nulli Secundus" (Latin: "Second to none") was a Semi-rigid airship. First flown on 10 September 1907, it was Britain's first powered military aircraft.