TASK DEFINITION: This task is about creating an unanswerable question based on a given passage. Construct a question that looks relevant to the given context but is unanswerable. Following are a few suggestions about how to create unanswerable questions:
(i) create questions which require satisfying a constraint that is not mentioned in the passage
(ii) create questions which require information beyond what is provided in the passage in order to answer
(iii) replace an existing entity, number, date mentioned in the passage with other entity, number, date and use it in the question
(iv) create a question which is answerable from the passage and then replace one or two words by their antonyms or insert/remove negation words to make it unanswerable.
PROBLEM: Passage: Downtown San Diego is the central business district of San Diego, though the city is filled with business districts. These include Carmel Valley, Del Mar Heights, Mission Valley, Rancho Bernardo, Sorrento Mesa, and University City. Most of these districts are located in Northern San Diego and some within North County regions.

SOLUTION: What is the central business district of downtown San Diego?

PROBLEM: Passage: Cork is home to the RTÉ Vanbrugh Quartet, and to many musical acts, including John Spillane, The Frank And Walters, Sultans of Ping, Simple Kid, Microdisney, Fred, Mick Flannery and the late Rory Gallagher. Singer songwriter Cathal Coughlan and Sean O'Hagan of The High Llamas also hail from Cork. The opera singers Cara O'Sullivan, Mary Hegarty, Brendan Collins, and Sam McElroy are also Cork born. Ranging in capacity from 50 to 1,000, the main music venues in the city are the Cork Opera House (capacity c.1000), Cyprus Avenue, Triskel Christchurch, the Roundy, the Savoy and Coughlan's.[citation needed] Cork's underground scene is supported by Plugd Records.[citation needed]

SOLUTION: What Opera singers currently lives in Cork?

PROBLEM: Passage: The polytechnics of Thuringia are based in Erfurt (4,500 students), Jena (5,000 students), Nordhausen (2,500 students) and Schmalkalden (3,000 students). In addition, there is a civil service college in Gotha with 500 students, the College of Music "Franz Liszt" in Weimar (800 students) as well as two private colleges, the Adam-Ries-Fachhochschule in Erfurt (500 students) and the SRH College for nursing and allied medical subjects (SRH Fachhochschule für Gesundheit Gera) in Gera (500 students). Finally, there are colleges for those studying for a technical qualification while working in a related field (Berufsakademie) at Eisenach (600 students) and Gera (700 students).

SOLUTION:
Where is the civil service college of Thuringia restricted?