Complex sentence: With support from WWF, Russian scientists and nature conservationists cooperated to create a cetacean sanctuary in the Magadan region which covers vast areas of north western Sea of Okhotsk including the Shantar regions.
Split into simpler sentences: With support from WWF, Russian scientists and nature conservationists cooperated to create a cetacean sanctuary in the Magadan region. This region covers vast areas of the northwestern Sea of Okhotsk, including the Shantar regions.