Initially I got slightly different results, and the reason is, when more than one Animal appears in an Article Title entry, apparently the first animal alphabetically is the one that counts. Example: One Article Title entry reads "Game of cat and mouse blacks out city", but only cat counts here, in order to get to the results provided. It really depends on the interpretation of each entry: Is the meaning here that literally one (or more!?) cats were hunting some mice? Then BOTH should be counted, right?! Or is the meaning perhaps totally different, it's just used as a metaphor for hunting down the error, something like that? Then NO animal would count - at least not cats or mice, maybe it was a cat and mouse game with some other animal that caused the blackout.
Just sayin' 😜