Detailed Instructions: In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
Problem:Passage: By the 1920s, Baylis concluded that the Old Vic no longer sufficed to house both her theatre and her opera companies. She noticed the empty and derelict Sadler's Wells theatre in Rosebery Avenue, Islington, on the other side of London from the Old Vic.  She sought to run it in tandem with her existing theatre.Baylis made a public appeal for funds in 1925.  With the help of the Carnegie Trust and many others, she acquired the freehold of Sadler's Wells. Work started on the site in 1926.  By Christmas 1930, a completely new 1,640-seat theatre was ready for occupation. The first production there, a fortnight's run from 6 January 1931, was Shakespeare's Twelfth Night. The first opera, given on 20 January, was Carmen. Eighteen operas were staged during the first season.The new theatre was more expensive to run than the Old Vic, as a larger orchestra and more singers were needed, and box office receipts were at first inadequate. In 1932, the Birmingham Post commented that the Vic-Wells opera performances did not reach the standards of the Vic-Wells Shakespeare productions. Baylis strove to improve operatic standards, while at the same time fending off attempts by Sir Thomas Beecham to absorb the opera company into a joint enterprise with Covent Garden, where he was in command.  At first, the apparent financial security of the offer appeared attractive, but friends and advisers such as Edward J. Dent and Clive Carey convinced Bayliss that it was not in the interests of her regular audience. This view received strong support from the press; The Times wrote:
The Old Vic began by offering opera of some sort to people who hardly knew what the word meant ... under a wise, fostering guidance it has gradually worked upwards ...Any kind of amalgamation which made it the poor relation of the 'Grand' season would be disastrous.
Solution:
What is the name of the existing theatre Baylis sought to run in tandem with Sadler's Wells theatre?