context: Adults with their kids are riding on a small red train.
hypothesis: Chances are about even that a family is riding the small train at an amusement park.
valid_hypothesis: Chances are about even that a family is riding the small train at an amusement park.
invalid_hypothesis: It is almost certain that a family is riding the small train at an amusement park.
hypothesis_assertion: A family is riding the small train at an amusement park.