Complex sentence: The American Geological Institute (AGI) is a nonprofit federation of 44 geoscientific and professional associations that represents more than 100,000 geologists, geophysicists, and other earth scientists.
Split into simpler sentences: The American Geological Institute (AGI) is a nonprofit federation of 44 geoscientific and professional associations. Together, these organizations represent more than 100,000 geologists, geophysicists, and other earth scientists.