context: Three children play with a giant sphere on a playground while an adult sits on a bench reading the newspaper.
hypothesis: We believe that some kids are playing outside on a playground while their mother is sitting down.
valid_hypothesis: We believe that some kids are playing outside on a playground while their mother is sitting down.
invalid_hypothesis: We doubt that some kids are playing outside on a playground while their mother is sitting down.
hypothesis_assertion: Some kids are playing outside on a playground while their mother is sitting down.