context: The tops of a large number of balloons are visible behind a wall, with a large high rise building in the background.
hypothesis: It is highly unlikely that a bunch of balloons can be seen as people wait for a surprise party to start.
valid_hypothesis: It is highly unlikely that a bunch of balloons can be seen as people wait for a surprise party to start.
invalid_hypothesis: It is probable that a bunch of balloons can be seen as people wait for a surprise party to start.
hypothesis_assertion: A bunch of balloons can be seen as people wait for a surprise party to start.