premise: Children play in the sand surrounded by a sand structure with a lot of window like openings. hypothesis: The children playing in the sand all know each other.
neutral: As the amount of children isn't stated there could be between 2 and thousands at the beach. It's possibly that two might not even know each other and might just be playing because they're both kids.|neutral: Just because a bunch of children are playing in the same sand doesn't mean they all know each other.|neutral: Children play in the sand surrounded by a sand structure doesn't mean that they all know each other.