Complex sentence: Sir William Robert Grove PC QC FRS (11 July 1811--1 August 1896) was a lawyer from Swansea, judge and physical scientist who anticipated the general theory of the conservation of energy and was a pioneer of fuel cell technology.
Split into simpler sentences: Sir William Robert Grove PC QC FRS (11 July 1811--1 August 1896) was a judge and physical scientist. He anticipated the general theory of the conservation of energy, and was a pioneer of fuel cell technology.