Complex sentence: Andreas Sigismund Marggraf was the son of the pharmacist Henning Christian Marggraf (1680--1754), who owned a pharmacy in Berlin and lectured at the Collegium medico chirurgium (medical school).
Split into simpler sentences: Andreas Sigismund Marggraf was the son of the pharmacist Henning Christian Marggraf (1680--1754). He owned a pharmacy in Berlin and tought at the Collegium medico chirurgium (medical school).