Complex sentence: As an example, he explains how prehistoric cave paintings of animals are normally seen as graceful and moving, while Margaret Abercrombie made a claim in 1960 that they are, in fact, depictions of dead animals.
Split into simpler sentences: As an example, he explains how prehistoric cave paintings of animals are often seen as graceful and moving. However, in 1960 Margaret Abercrombie claimed that the paintings are, in fact, depictions of dead animals.