Complex sentence: By September, tests run at the University of Idaho confirmed that OR-7's mate is a wolf, that the two pups are their offspring, and that the mate is related to the wolves in the Minam and Snake River packs of northeastern Oregon.
Split into simpler sentences: By September, tests run at the University of Idaho confirmed that OR-7's mate is a wolf and that the two pups are their offspring. The tests also showed that the mate is related to the wolves in the Minam and Snake River packs of northeastern Oregon.