Complex sentence: The Wildlife Conservation Society was originally chartered by New York on April 26,1895 as the New York Zoological Society with a mandate to advance wildlife conservation, promote the study of zoology, and create a first-class zoological park.
Split into simpler sentences: The Wildlife Conservation Society traces its origin to April 26,1895 when New York chartered the organization as the New York Zoological Society. As one of the first conservation organizations in the United States, WCS began with a clear mandate: advance wildlife conservation, promote the study of zoology, and create a first-class zoological park.