Complex sentence: In 1906, it was created the Seismological Service of Chile (Servicio Sismológico de Chile), whose first chief executive was Fernand de Montessus de Ballore.
Split into simpler sentences: In 1906, the Seismological Service of Chile (Servicio Sismológico de Chile) was created. Its first chief executive was Fernand de Montessus de Ballore.