Generate a question about the topic "Disulfide bond" whose answer would be: In chemistry , a disulfide bond (Br.E. disulphide bond) is a covalent bond , usually derived by the coupling of two thiol groups ..
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Answer: what structure is disulfide bonds?


Generate a question about the topic "Area code 217" whose answer would be: Area code 217 is the North American telephone area code for much of western and central Illinois ..
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Answer: what area code is 217?


Generate a question about the topic "Mary Poppins (film)" whose answer would be: Mary Poppins is a 1964 musical film starring Julie Andrews , Dick Van Dyke , David Tomlinson , and Glynis Johns , produced by Walt Disney , and based on the Mary Poppins books series by P. L. Travers ..
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Answer:
who plays mary poppins in the movie?