Complex sentence: The Helius CoRDe Biomass Plant was a joint venture by the Combination of Rothes Distillers Ltd and Helius Energy which was officially opened by Charles, Prince of Wales on 16 April 2013.
Split into simpler sentences: The Helius CoRDe Biomass Plant was a joint venture by the Combination of Rothes Distillers Ltd and Helius Energy. It was officially opened by Charles, Prince of Wales, on 16 April 2013.