premise: Two girls, one in overalls, holding on to a fence with water behind them. hypothesis: Two Girls are holding up a fence with water behind them and one is in overalls with pokedots.
neutral: Just because the girls are holding onto the fencing does not mean they are holding it up or supporting it. While one girl is wearing overalls, the color and pattern of the overalls is not described, so she is not necessarily wearing polka dot overalls.