The letters of the real phrase were being then used to generate an acronym. In short, the phrase existed, then the acronym was made from the letters inside the term. Backronyms: en.wikipedia.org/wiki/Backronym I think the puzzle arises from the common but mistaken perception that prepositions should have noun-phrase object complements. https://teknologipendidikanmenuru21235.blogdeazar.com/36885852/fascination-about-wsop-online-poker