Complex sentence: Adventures of the Little Mermaid was an animated series produced by Fuji Television in the early 1990s, based on upon the Hans Christian Andersen fairy tale "The Little Mermaid".
Split into simpler sentences: Adventures of the Little Mermaid was an animated series produced by Fuji Television in the early 1990s,. It is based on upon the Hans Christian Andersen fairy tale "The Little Mermaid".