Solution needed. The answer is EUROPEAN UNION.
Archivist's Note: Here is some speculation about how the puzzle might be solved:
The bit about file drawer labels may mean that we will need to alphabetize these answers, maybe get one for each letter of the alphabet.
There are some unused images in the folder for this puzzle: item20.jpg, some sort of tunnel (which doesn't seem to go along with the actual item 20); icone.jpg, a cone for ice cream; and duplicate copies of some of the other images which spoil their intended answers (apparently the American Greetings card is a forget-me-not, the invented parody of Fahrenheit 451 is supposed to be Kelvin Zero, and item 6 is something abbreviated "aba").
This seems to make most things start with distinct letters. Try alphabetizing.
If we want the last letters of these things, then we might be trying to complete _ N I O _ _ E _ _ _ O _ N _ 2 _ L E L L _ O _ N E L.
Additional insight from Michael Sylvia: nearly all of the answers end with either a number (usually one or two, though Henry IV gives four) or a syllable indicative of nothingness (null, none, no, naught, etc.) The person found eating pomegranate seeds is likely Perseph(one).
Possibly, since you'd wind up associating each of the twenty-six letters with a number in this way, and the majority of them seem to be zeroes, the solution might involve anagramming together that quantity of each letter? The four Hs make this seem a little less than promising, though, and if it is the right method, the missing data would make this likely impossible to solve now.