Two men in yellow life jackets , one wearing sunglasses , are sitting in a moving motor boat .
We believe that two men in yellow life jackets , one wearing sunglasses , are driving a motor boat .
We believe that two men in yellow life jackets , one wearing sunglasses , are driving a motor boat .
It is probably not the case that two men in yellow life jackets , one wearing sunglasses , are driving a motor boat .
Two men in yellow life jackets , one wearing sunglasses , are driving a motor boat .