Complex sentence: While La Palma became one of the largest saltpeter extractors of the whole region Santa Laura did not go well as production was low so it was taken over in 1902 by the Tamarugal Nitrate Company.
Split into simpler sentences: While La Palma became one of the largest saltpeter extractors of the whole region, Santa Laura did not do well, as production was low. It was taken over in 1902 by the Tamarugal Nitrate Company.