Is there a way to copy-paste including the full numbering of a specific clause, (or otherwise extract the full clause numbering) for a multi-level list?

For example, if I copy the text "urna" in the following, would there be a way to paste with the full clause number automatically included, like so?
12.6(b)(i)C.iii. urna

Or alternatively, would there be some other way of extracting 12.6(b)(i)C.iii. for "urna"?

(apologies for the lines, I didn't know how else to format with indents)
12.6 Dignissim Faucibus
__(a) Scelerisque
____(i) Condimentum ultrices ut eleifend tellus aliquet cursus sed blandit praesent sollicitudin pulvinar..
____(ii) Vestibulum ut torquent. Aliquet turpis nec nonummy et.
__(b) Eros Quisque Mauris
____(i) Curabitur augue sit dui in vestibulum.
______A. Nulla sed felis. Lacus et in
______B. Vel felis dolor dignissim pellentesque felis.
______C. Accumsan amet ipsum. Vitae amet feugiat.
________i. enim
________ii. fermentum
________iii. urna
____(ii) Lorem ipsum dolor. Sit amet leo.
______A. Et sollicitudin lacus.
______B. Augue quis doloribus. Arcu tristique quis