Complex sentence: She became Grocers Research Scholar at Lister in 1912, was seconded to the Board of Trade for the war in 1914, and later moved to the Minister of Munitions, where she remained until March 1919, when she resigned because of her pregnancy.
Split into simpler sentences: She became Grocers Research Scholar at Lister in 1912, was seconded to the Board of Trade for the war in 1914, and later moved to the Minister of Munitions. She remained there until March 1919, when she resigned because of her pregnancy.