Generate a question about the following movie plot: Pepperland is a cheerful, music-loving paradise under the sea, protected by Sgt. Pepper's Lonely Hearts Club Band. The titular Yellow Submarine rests on an Aztec-like pyramid on a hill. At the edge of the land is a range of high blue mountains. The land falls under a surprise attack from the music-hating Blue Meanies, who live in or beyond the blue mountains. The attack starts with magical projectiles fired from big artillery stationed in the blue mountains. The Blue Meanies seal the band inside a music-proof blue glass globe, they render the Pepperlanders immobile as statues by shooting arrows and dropping giant green apples upon them (a reference to the Apple Records music label), and drain the countryside of colour. In the last minute before his capture, Pepperland's elderly Lord Mayor sends Old Fred, an aging sailor (whom the mayor calls "Young Fred"), to get help; he runs to the Yellow Submarine and takes off in it ("Yellow Submarine"). Old Fred travels to Liverpool ("Eleanor Rigby"), where he follows the depressed and aimless Ringo and persuades him to return to Pepperland with him. Ringo collects his "mates" John, George, and finally Paul in The Pier, a house-like building on the top of a hill. The five journey back to Pepperland in the yellow submarine. As they start learning to operate the submarine, they sing "All Together Now", after which they pass through several regions on their way to Pepperland: Sea of Time where time flows both forwards and backwards to the tune of "When I'm Sixty-Four". At one point, the submarine passes itself as it loops through time. Sea of Science where they sing "Only a Northern Song". Just before the song finishes, they pick up a monster. Sea of Monsters The monster is ejected into a sea inhabited by other weird monsters. Ringo presses the panic button on the submarine, ejecting him from the submarine and into the sea. He is seen riding one of the monsters, who tosses him around, and with the threat of Native American-like creatures, resulting in John...
Answer:
What song did everyone sing at the enormous party?