Complex sentence: A report was published by Chernobyl Forum in 2005 that revealed thyroid cancer among children to be one of the main health impacts from the Chernobyl accident.
Split into simpler sentences: A report was published by Chernobyl Forum in 2005. The 2005 Chernobyl Forum report revealed thyroid cancer among children to be one of the main health impacts from the Chernobyl accident.