Title: London Has Fallen
Passage: London Has Fallen is a 2016 American action thriller film directed by Babak Najafi and written by Creighton Rothenberger, Katrin Benedikt, Chad St. John and Christian Gudegast. It is a sequel to Antoine Fuqua's 2013 film Olympus Has Fallen and stars Gerard Butler, Aaron Eckhart and Morgan Freeman, with Alon Moni Aboutboul, Angela Bassett, Robert Forster, Jackie Earle Haley, Melissa Leo, Radha Mitchell, Sean O'Bryan, Waleed Zuaiter and Charlotte Riley in supporting roles.
Question: is london has fallen a sequel to another movie
Answer: yes