Determine the topic of the passage. "In chemistry , a disulfide bond (Br.E. disulphide bond) is a covalent bond , usually derived by the coupling of two thiol groups ." Topic:
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Answer: Disulfide bond


Determine the topic of the passage. "Area code 217 is the North American telephone area code for much of western and central Illinois ." Topic:
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Answer: Area code 217


Determine the topic of the passage. "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 ." Topic:
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Answer:
Mary Poppins (film)