Complex sentence: They concluded that glossolalia (speaking in tongues) was proof that the Holy Spirit had fallen upon an individual, and this became the official doctrine of a number of groups that trace their beginnings to Parham's School and Agnes Ozman's experience.
Split into simpler sentences: They concluded that glossolalia (speaking in tongues) was proof that the Holy Spirit had fallen upon an individual. This became the official doctrine of a number of groups that trace their beginnings to Parham's School and Agnes Ozman's experience.