Complex sentence: Pimps are reported to imprison young children who are virgins and not put them to work until they have been presented to a series of bidders, such as high-ranking military officers, politicians, businessmen, and foreign tourists.
Split into simpler sentences: Pimps are reported to imprison young children who are virgins. These children would not be placed to work until they had been presented to a series of bidders, such as high-ranking military officers, politicians, businessmen, and foreign tourists.