Complex sentence: He shorttly worked in a school in Glarisegg (TG, CH) and later founded an experimental school ('La Forge') in Lausanne, Switzerland, but Adolphe Ferrière had to quickly abandon teaching due to his deafness.
Split into simpler sentences: He shorttly worked in a school in Glarisegg (TG, CH). He founded an experimental school ('La Forge') in Lausanne, Switzerland, but Adolphe Ferrière had to quickly abandon teaching due to his deafness.