Complex sentence: The Girl, wanting to put things right, sets off in search of the Little Prince, while using the gutter to escape from her room without her Mother knowing, the Girl falls into the Aviator's yard and blacks out.
Split into simpler sentences: The Girl, wanting to put things right, sets off in search of the Little Prince. While using the gutter to escape from her room without her Mother knowing, the Girl falls into the Aviator's yard and blacks out.