Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: What is the zoo's grand opening threatened by? Title: We Bought a Zoo Movie plot: Recently widowed Benjamin Mee (Matt Damon), still grieving his loss and dealing with the expulsion of his 14-year-old son, Dylan (Colin Ford), from school, decides to make a fresh start by buying a new house. He tours many houses with his 7-year-old daughter, Rosie (Maggie Elizabeth Jones), and his realtor, Mr. Stevens (J.B. Smoove), but finds none he likes until his daughter finds a listing with what seems like the perfect house. They drive to an old large house and Benjamin inspects the property, telling his realtor it is perfect. When they hear a lion roar, Stevens explains that the house comes with a zoo in the back, which closed several years before; if they want the house, they must buy the zoo. Although reluctant at first, Mee decides to buy the zoo when he sees Rosie happily playing with the peacocks. Dylan, however, hates the idea of moving away from his friends and retreats into his artwork which has grown more macabre since the death of his mother. Benjamin's brother, Duncan (Thomas Haden Church), tries to dissuade him from the purchase, but Benjamin buys it anyway. The zoo staff, led by the 28-year-old head keeper, Kelly Foster (Scarlett Johansson), help to start renovating the zoo with the intent to reopen it to the public. When Kelly confronts Benjamin about why he bought a zoo, knowing nothing about running one, Benjamin simply responds "Why not?". Dylan befriends Kelly's 13-year-old homeschooled cousin, Lily Miska (Elle Fanning), who develops a romantic interest that Dylan is oblivious to. A strict USDA inspector, Walt Ferris (John Michael Higgins), arrives for a surprise inspection and makes a list of repairs that would cost around $100,000, which Benjamin does not have. Rhonda Blair (Carla Gallo), the zoo's accountant, gossips that Benjamin will probably sell the zoo. The workers' morale sinks, fearing the property will be sold to a buyer that will close it down. When Lily tells Dylan that she heard his family might be leaving, he is overjoyed, which hurts her feelings. Benjamin discovers...
Answer:
A rainstorm