Complex sentence: On 1st December 2016 the Princess Cruise Lines, owner of the Caribbean Princess, was fined $40million by the U.S. Department of Justice because the Caribbean Princess had been seen dumping oil-contaminated waste into the English Channel in August 2013.
Split into simpler sentences: On 1st December 2016 the Princess Cruise Lines, owner of the Caribbean Princess, was fine $40million by the U.S. Department of Justice. The Caribbean Princess had been seen dumping oil-contaminated waste into the English Channel in August 2013.