Complex sentence: His song "I Got You" seems in retrospect an obvious choice as a first single and although Mushroom reportedly had misgivings about it proved to be a massive success that finally established the group in the front rank of bands in Australasia.
Split into simpler sentences: His song "I Got You" seems in retrospect an obvious choice as a first single although Mushroom reportedly had misgivings about it. Nevertheless it proved to be a massive hit that finally established the group in the front rank of bands in Australasia.