Swallows and Amazons 2016

Overview

Task: Write a factual, original 150-190 word overview of the film "Swallows and Amazons" (2016).
Constraints:
Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
No invented/guessed names, dates, counts, awards, ratings, etc.
Write original, neutral, encyclopedic prose in plain text.
No markdown, no asterisks, no headings, no bullet points.
First sentence must not contain spoilers.
Word count: 150-190 words.
Title: Swallows and Amazons
Year: 2016
Release Date: 08/19/2016 (GB)
Genre: Adventure and Family
Rating: PG
Runtime: 1h 37m
Plot: Four children dream of escaping the tedium of a summer holiday with their mother. They get permission to camp on their own on an island in the middle of a vast lake. They are overjoyed. Upon arrival, they discover they may not be alone. A battle for ownership of a lonely island teaches them survival skills, the value of friendship, and the importance of holding your nerve.
Draft 1 (Mental Outline):
Swallows and Amazons is a 2016 adventure and family film with a runtime of 1 hour and 37 minutes. Released in Great Britain on August 19, 2016, the movie is rated PG. The story follows four children who wish to escape the tedium of a summer holiday