Complex sentence: It was announced that CNN finance analyst Ali Velshi is the first major name to join Al Jazeera America he will host a 30 minute show that will be weekly that by the end of the year will be a nightly show.
Split into simpler sentences: It was announced that CNN finance analyst Ali Velshi is the first major name to join Al Jazeera America. He will host a weekly, 30 minute show that will, by the end of the year be a nightly show.