Complex sentence: On 4 October 2000, the Center for Biological Diversity petitioned the National Marine Fisheries Service (NMFS) to designate a critical habitat for the North Pacific Right Whale, asserting that the southeast Bering Sea shelf from 55-60 ° N should be considered critical habitat.
Split into simpler sentences: On 4 October 2000, the Center for Biological Diversity petitioned the National Marine Fisheries Service to designate a critical habitat for the North Pacific right Whale. Petitioners asserted that the southeast Bering Sea shelf from 55-60E N latitude should be considered critical habitat.