You will be presented with a citation segment from the section of a research paper. Classify the intent behind this citation by choosing from one of the following categories:

- Method: Cites the paper for its methodology or procedure.
- Background: Cites the paper to provide background information.
- Result: Cites the paper for its findings or results.

Your answer should be a single word from the following list of options: ["Method", "Background", "Result"]. Do not include any other text in your response.

Citation sentence:

Although truncated forms of TRAF6 lacking the really interesting new gene (RING) domain were reported to restore IL-1-signaling to TRAF6 knockout (KO) mouse embryonic fibroblasts (MEFs) many years ago (16), other laboratories reported subsequently that the E3 ligase-inactive TRAF6[C70A] mutant could not (12, 17, 18).
Background