Complex sentence: They were soon being recommended for children, weak and anaemic adults, and people suffering from gastritis, and in 1852, the "Société Anonyme de l'Etablissement Thermal de Salazie" was founded, which built the spa, a casino and a director's house.
Split into simpler sentences: They were soon being recommended for children, weak and anaemic adults, as well as people suffering from gastritis. In 1852, the "Société Anonyme de l'Etablissement Thermal de Salazie" was founded, which built the spa, a casino and a director's house.