Complex sentence: Such an approach values a local understanding of history grounded firmly in a global anthropological context, and is best achieved through the development of applicable theoretical frameworks borne of rigorous professionalism (Yellowhorn 2006: 195).
Split into simpler sentences: Such an approach values a local understanding of history that is also grounded firmly in a global anthropological context. Yellowhorn says that it is best achieved through the "development of applicable theoretical frameworks borne of rigorous professionalism" (Yellowhorn 2006: 195).