Question: Special 26, also known as Special Chabbis, is a 2013 Indian period heist crime thriller film directed by Neeraj Pandey, the film is inspired by which 1987 titled event, a group posing as CBI officers executed the fake income tax investigation raid on the Opera House branch of Tribhovandas Bhimji Zaveri & Sons Jewellers in Mumbai, India?
Sentence (from "1987 Opera House heist"): This case has remained unsolved.
Relevant evidence: No