Complex sentence: The American women's rights movement was also born in Upstate New York at this time; the Seneca Falls Convention, the first women's rights convention, was held at Seneca Falls in 1848.
Split into simpler sentences: The American women's rights movement was also born in Upstate New York at this time. The Seneca Falls Convention, the first women's rights convention, was held at Seneca Falls in 1848.