Complex sentence: Paul Kosok, a historian from Long Island University, is credited as the first scholar to seriously study the Nazca Li in 1940-41 to study ancient irrigation systems, he flew over the lines and realized that one was in the shape of a bird.
Split into simpler sentences: Paul Kosok, a historian from Long Island University, is credited as the first scholar to seriously study the Nazca Lines. In the country in 1940-41 to study ancient irrigation systems, he flew over the lines and realized that one was in the shape of a bird.