Task: Explanation
Input (English): Valerian and the City of a Thousand Planets (French: "Valérian et la Cité des mille planètes" ) is a 2017 English-language French 3D science fiction adventure film written and directed by Luc Besson, and co-produced by Besson and his wife, Virginie Besson-Silla. The film is based on the French science fiction comics series "Valérian and Laureline", written by Pierre Christin and illustrated by Jean-Claude Mézières. It stars Dane DeHaan as Valerian and Cara Delevingne as Laureline, with Clive Owen, Rihanna, Ethan Hawke, Herbie Hancock, Kris Wu and Rutger Hauer in supporting roles. Besson independently crowd-sourced and personally funded "Valerian" and, with a production budget of around $180 million, it is both the most expensive European and independent film ever made. Question: Dane DeHaan played the title character in which 2017 3D film written by Luc Besson? Answer: Valerian and the City of a Thousand Planets
Output (English): Valerian and the City of a Thousand Planets French: Valérian et la Cité des mille planètes  is a 2017 Englishlanguage French 3D science fiction adventure film written and directed by Luc Besson, and coproduced by Besson and his wife, Virginie BessonSilla.