human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "the cloud adoption toolkit supporting cloud adoption decisions in the enterprise"
  Abstract: Cloud computing promises a radical shift in the provisioning of computing resource within the enterprise. This paper describes the challenges that decision makers face when assessing the feasibility of the adoption of cloud computing in their organisations, and describes our Cloud Adoption Toolkit, which has been developed to support this process. The toolkit provides a framework to support decision makers in identifying their concerns, and matching these concerns to appropriate tools/techniques that can be used to address them. Cost Modeling is the most mature tool in the toolkit, and this paper shows its effectiveness by demonstrating how practitioners can use it to examine the costs of deploying their IT systems on the cloud. The Cost Modeling tool is evaluated using a case study of an organization that is considering the migration of some of its IT systems to the cloud. The case study shows that running systems on the cloud using a traditional "always on" approach can be less cost effective, and the elastic nature of the cloud has to be used to reduce costs. Therefore, decision makers have to be able to model the variations in resource usage and their systems deployment options to obtain accurate cost estimates.

Connected through hyperedge HE-1 (induced by source paper "cloud brokerage a systematic survey"):
  with members:
    - "price and performance of cloud hosted virtual network functions analysis and future challenges"
    - "same same but different a descriptive differentiation of intra cloud iaas services"
    - "daleel simplifying cloud instance selection using machine learning"
    - "socloud a service oriented component based paas for managing portability provisioning elasticity and high availability across multiple clouds"
    - "container based cloud virtual machine benchmarking"
    - "cloud services brokerage a survey and research roadmap"
    - "academic cloud computing research five pitfalls and five opportunities"
    - "experiences of using a hybrid cloud to construct an environmental virtual observatory"

Connected through hyperedge HE-2 (induced by source paper "analytics for the internet of things a survey"):
  with members:
    - "middleware technologies for cloud of things a survey"
    - "big data computing and clouds"
    - "context aware computing for the internet of things a survey"
    - "graphx unifying data parallel and graph parallel analytics"
    - "context aware sensor search selection and ranking model for internet of things middleware"
    - "querying over federated sparql endpoints a state of the art survey"

Connected through hyperedge HE-3 (induced by source paper "cloud services brokerage a survey and research roadmap"):
  with members:
    - "academic cloud computing research five pitfalls and five opportunities"
    - "cloud benchmarking for performance"

Connected through hyperedge HE-4 (induced by source paper "a survey study on major technical barriers affecting the decision to adopt cloud services"):
  with members:
    - "decision support tools for cloud migration in the enterprise"

Connected through hyperedge HE-5 (induced by source paper "factors influencing risk acceptance of cloud computing services in the uk government"):
  with members:
    - "atlas a flexible and extensible architecture for linguistic annotation"

Connected through hyperedge HE-6 (induced by source paper "cloudgenius decision support for web server cloud migration"):
  with members:
    - "mc2 2 a generic decision making framework and its application to cloud computing"
    - "decision support tools for cloud migration in the enterprise"

Connected through hyperedge HE-7 (induced by source paper "decision support tools for cloud migration in the enterprise"):
  with members:
    - "cloud migration a case study of migrating an enterprise it system to iaas"
    - "research challenges for enterprise cloud computing"

Connected through hyperedge HE-8 (induced by source paper "cloudgenius automated decision support for migrating multi component enterprise applications to clouds"):
  with members:
    - "mc2 2 a generic decision making framework and its application to cloud computing"
    - "decision support tools for cloud migration in the enterprise"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.DC(Distributed, Parallel, and Cluster Computing)