revision preference src: Its master, a young prince, is trying his best to keep the ship out of harm, but he fails, and eventually falls into the waves. Four mermaid princesses come from a magnificent alabaster underwater palace. <SEP> tgt: Its master, a young prince, is trying his best to keep the ship out of harm, but he fails, and eventually falls into the waves. Meanwhile, four mermaid princesses come from a magnificent alabaster underwater palace.