Complex sentence: Over the next eight years, Dr Truby King had interests in psychology, medicine, nutrition, child care, and alcoholism, but it was the establishment of the Plunket Society in 1907 for which he is best known.
Split into simpler sentences: Over the next eight years Dr Truby King had interests in psychology, medicine, nutrition, child care and alcoholism. But it is the establishment of the Plunket Society in 1907 for which he is best known.