26Concerning the last point, the Court recalls that the need to provide an interpretation of EU law which will be of use to the national court requires that the national court define the factual and legal context of the questions it is asking or, at the very least, that it explain the factual circumstances on which those questions are based. Those requirements are of particular importance in the area of competition, where the factual and legal situations are often complex (judgment of 21 November 2013, Deutsche Lufthansa, C‑284/12, EU:C:2013:755, paragraph 20).
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