[racket] a simple? regexp-match/replace

Hi all,
i'm reading the documentation on cookies (net/cookie), and i try to save
with a cookie an user action in my blog.
For example, the cookie "my-cookie" has this content :
id=blabla; Version=1
OR this one :  id="bla bla"; Version=1
How can i just extract the string "bla bla" or blabla ?

thanks,
-mw
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