Complex sentence: In 1929, she and her husband started a ceramics business called "Les Grès Flammés" ("Fired Stoneware") where she put to work her expertise in physics and chemistry.
Split into simpler sentences: In 1929, she and her husband started a ceramics business called "Les Grès Flammés" ("Fired Stoneware"). Claude put to work her expertise in physics and chemistry.