Answer the following question: Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: What year did Fuller use for his VR simulation? Title: The Thirteenth Floor Movie plot: In late 1990s Los Angeles, Hannon Fuller (Armin Mueller-Stahl) owns a multibillion-dollar computer enterprise and is the inventor of a newly completed virtual reality (VR) simulation of 1937 Los Angeles, filled with simulated humans unaware they are computer programs. When Fuller is murdered just as he begins premature testing of the VR system, his friend and protege, Douglas Hall (Craig Bierko), who is also the heir to the company, becomes the primary suspect. The evidence against him is so strong that Hall begins to doubt his own innocence. Between interrogations by LAPD Detective Larry McBain (Dennis Haysbert), Hall meets Jane Fuller (Gretchen Mol), the estranged daughter of Hannon Fuller, who is busy with the shutdown of the new VR system. Hall then romances her. When a local bartender is murdered after he claims to have witnessed a meeting between Hall and Fuller on the night Fuller was murdered, Hall is arrested. He is released when Jane gives him an alibi. With the assistance of his associate Whitney (Vincent D'Onofrio), Hall attempts to find a message that Fuller left for him inside the simulation. Entering the virtual reality, Hall becomes a bank clerk named John Ferguson. Fuller left the message with a bartender named Jerry Ashton (Vincent D'Onofrio), who read the message and discovered he is an artificial creation. Earlier, Ashton notices that Ferguson switched places with Hall in the men's restroom of the hotel where Ashton works, and began to realize that something was wrong. Frightened and angry, Ashton tries to kill Hall. Hall barely survives to escape the virtual reality. McBain informs Hall that Jane does not exist, as Fuller never had a daughter. Hall tracks her down only to discover her double, Natasha Molinaro, working as a grocery store clerk but Molinaro does not recognize Hall. This leads Hall to perform an experiment outside the VR system, something that Fuller's letter instructed him to try: drive to a place where he never would have considered going otherwise. He does so, and...
Answer:
1937