Complex sentence: In 2016, Pew Research found that Millennials surpassed Baby Boomers to become the largest living generation in the U.S, by analyzing 2015 U.S Census data they found there were 75.4 million Millennials compared to 74.9 million Baby Boomers.
Split into simpler sentences: In 2016, Pew Research found that Millennials surpassed Baby Boomers to become the largest living generation in the United States. By analyzing 2015 U.S Census data they found there were 75.4 million Millennials compared to 74.9 million Baby Boomers.