Complex sentence: From 1972, Guy, Potger and Woodley planned on reforming The Seekers without Durham, by 1975 they had recruited Louisa Wisseling--a semi-professional folk singer formerly with Melbourne band The Settlers.
Split into simpler sentences: From 1972, Guy, Potger and Woodley planned on reforming the Seekers without Durham. By 1975 they had recruited Louisa Wisseling, a semi-professional folk singer formerly with Melbourne group the Settlers.