Complex sentence: On June 19,2004 in Los Angeles, Ayala once again ventured into the featherweight division in a losing effort against fellow former world champion Marco Antonio Barrera, Ayala was knocked tkoed in ten rounds.
Split into simpler sentences: On June 19,2004 in Los Angeles, Ayala once again ventured into the featherweight division. In a losing effort against fellow former world champion Marco Antonio Barrera, Ayala was knocked out in ten rounds.