Complex sentence: Shirley McGreal, director of the International Primate Protection League (IPPL), said that the United States Department of Defense is one of the biggest client using the monkeys in biological warfare weapons research: the monkeys are poisoned with sarin, anthrax, ebola during experimentation.
Split into simpler sentences: Shirley McGreal, director of the International Primate Protection League (IPPL), said that the United States Department of Defense is one of the biggest client using the monkeys in biological warfare weapons research. The monkeys are poisoned with sarin, anthrax, ebola during experimentation.