Original sentence: In 1925, based upon the Sector Principle, Canada became the first country to extend its boundaries northward to the North Pole, at least on paper, between 60°W and 141°W longitude, a claim that is not universally recognized (there is in fact 770 km of ocean between the Pole and Canada's northernmost land point)
Edited sentence: In 1925, based upon the Sector Principle, Canada became the first country to extend its boundaries northward to the North Pole, at least on paper, between 60°W and 141°W longitude, a claim that is not internationally recognized (there is in fact 770 km of ocean between the Pole and Canada's northernmost land point)