Case C-726/19: Judgment of the Court (Seventh Chamber) of 3 June 2021 (request for a preliminary ruling from the Tribunal Superior de Justicia de Madrid — Spain) — Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentario v JN (Reference for a preliminary ruling — Social policy — Directive 1999/70/EC — Framework agreement on fixed-term work concluded by ETUC, UNICE and CEEP — Clause 5 — Applicability — Concept of ‘successive fixed-term employment contracts or relationships’ — Fixed-term employment contracts in the public sector — Measures to prevent and penalise the misuse of successive fixed-term employment contracts or relationships — Concept of ‘objective reasons’ justifying such contracts — Equivalent legal measures — Obligation to interpret national law in conformity with EU law — Economic crisis)