input question: Determine the topic of the question-answer pair. Question: "who played batman in dark knight?"; Answer: "Christian Bale reprises the lead role of Bruce Wayne/Batman, with a returning cast of Michael Caine as Alfred Pennyworth , Gary Oldman as James Gordon and Morgan Freeman as Lucius Fox ."? Topic:???
output answer: The Dark Knight (film)

Determine the topic of the question-answer pair. Question: "how much total wealth in USA?"; Answer: "Including human capital such as skills, the United Nations estimated the total wealth of the United States in 2008 to be $118 trillion."? Topic:
----
Answer: Wealth in the United States

Q: Determine the topic of the question-answer pair. Question: "what is lean manufacturing and who developed?"; Answer: "Lean manufacturing is a management philosophy derived mostly from the Toyota Production System (TPS) (hence the term Toyotism is also prevalent) and identified as "Lean" only in the 1990s."? Topic:
A: Lean manufacturing

Question: Determine the topic of the question-answer pair. Question: "where did erisa come from?"; Answer: "ERISA was enacted to protect the interests of employee benefit plan participants and their beneficiaries by:"? Topic:
Answer: Employee Retirement Income Security Act

[Q]: Determine the topic of the question-answer pair. Question: "what is adem disease?"; Answer: "It usually occurs following a viral infection but may appear following vaccination , bacterial or parasitic infection, or even appear spontaneously."? Topic:
****
[A]: Acute disseminated encephalomyelitis

Problem: Given the question: Determine the topic of the question-answer pair. Question: "what naturally occurring isotopes does cobalt have?"; Answer: "Naturally occurring cobalt (Co) is composed of 1 stable isotope , 59Co. 28 radioisotopes have been characterized with the most stable being 60Co with a half-life of 5.2714 years, 57Co with a half-life of 271.79 days, 56Co with a half-life of 77.27 days, and 58Co with a half-life of 70.86 days."? Topic:
++++++++++++++++++++++++++++++++
The answer is:
Isotopes of cobalt