Complex sentence: Their 2008 YouTube video cover of the song "Tiger Mountain Peasant Song" by Fleet Foxes spread their name rapidly on the Internet: the sisters subsequently appeared alongside Fleet Foxes performing the song in a concert in the Netherlands.
Split into simpler sentences: Their 2008 YouTube video cover of the song "Tiger Mountain Peasant Song" by Fleet Foxes spread their name rapidly on the Internet:. The sisters subsequently appeared alongside Fleet Foxes performing the song in a concert in the Netherlands.