premise: A van with flags advertising floats, boogie boards, umbrellas, chairs, and surfboards. hypothesis: The van is colorfully overflowing with a melange of advertising signs.
entailment: The flags on the van are advertising a bunch of different products. Assuming that every product has its own flag, or sign, and color, it would be an overwhelmingly amount of colors and would definitely make sense as an advertising tactic. Putting all the concepts together would definitely create a melange of colorfully crafted advertisements.