37It should, nonetheless, be added that, although the national court has sole jurisdiction to determine the facts in the case before it and to interpret the national legislation, in preliminary ruling proceedings the Court, which is called on to provide answers of use to the national court, may provide guidance based on the documents in the file in the main proceedings and on the observations submitted to it, in order to enable the national court to give judgment (judgment of 24 February 2015, Grünewald, C‑559/13, EU:C:2015:109, paragraph 32).
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