Complex sentence: Mary O'Shiell (1715-d. after 1745), was a French-Irish businessperson in Nantes in France, where she is a known figure in the history of Nantes, alongside her sisters Agnés O'Shiell and Anne O'Shiell.
Split into simpler sentences: Mary O'Shiell (1715-d. after 1745), was a French-Irish businessperson. She is a known figure in the history of Nantes, alongside her sisters Agnés O'Shiell and Anne O'Shiell.