Complex sentence: From the second marriage, his son and heir, Anton (1849-1921) was born; he married Katherina Meichl of Simmerling, whom he met on a visit to the Polytechnical Institute of Zurich.
Split into simpler sentences: From the second marriage, his son and heir, Anton (1849-1921) was born. He married Katherina Meichl of Simmerling, whom he met on a visit to the Polytechnical Institute of Zurich.