somebody drafted their intro to transformers at
   [1]https://xamat.medium.com/transformers-models-an-introduction-and-cat
   alogue-2022-edition-2d1e9039f376
   marked spam cause it seems it would make sense to type it over onto the
   list, so I might learn some of it, and maybe review its currentness and
   transparency a little.

References

   1. https://xamat.medium.com/transformers-models-an-introduction-and-catalogue-2022-edition-2d1e9039f376