Complex sentence: Estimates of the population of the Pitcairn Islands range from 46 to 48, and beyond this point it is difficult to keep accurate statistics on such points as age structure due to the remoteness of the settlement.
Split into simpler sentences: Estimates of the population of the Pitcairn Islands range from 46 to 48. It is difficult to keep accurate statistics on aspects such as age structure due to the remoteness of the settlement.