Complex sentence: This sub-hierarchy has also been used for self-promotion by otherwise unknown people, and during a notorious trial, "alt.fan.karla-homolka" was created to get around the Canadian news blackout on the case.
Split into simpler sentences: This sub-hierarchy has also been used for self-promotion by otherwise unknown people. During a notorious trial, "alt.fan.karla-homolka" was created to get around the Canadian news blackout on the case.