@qwerrie You disappoint me as it appears that you did not look my post containing my entry & photos before leaving your comment or you would understand better why TWO words were specified. To save time searching, here it is: specifictypeofpool
The second photo has a swimming pool where the swim meet took place. If I only stated "POOL" as my keyword someone might wrongly think I was referring to the type of pool that my son is playing in this photo.
Hope this clarifies things for you!