You'd have to write code to parse the field at spaces. It's tiresome when you do, because names are rarely uniform - I have three forenames, fo instance.
If you don't want to write code, you canexprot the fireld to Excel, which has a parsing routine built in, but you still have the problem of non-uniformity.
Finally, I think that Woody's Access Watch might have addressed the issue. Try searching the internet for Helen Feddema, who would have written the article.
Access makes all things possible. It even makes them intelligible