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: "fogstore toward a distributed data store for fog computing"
  Abstract: Stateful applications and virtualized network functions (VNFs) can benefit from state externalization to increase their reliability, scalability, and inter-operability. To keep and share the externalized state, distributed data stores (DDSs) are a powerful tool allowing for the management of classical trade-offs in consistency, availability and partitioning tolerance. With the advent of Fog and Edge Computing, stateful applications and VNFs are pushed from the data centers toward the network edge. This poses new challenges on DDSs that are tailored to a deployment in Cloud data centers. In this paper, we propose two novel design goals for DDSs that are tailored to Fog Computing: (1) Fog-aware replica placement, and (2) context-sensitive differential consistency. To realize those design goals on top of existing DDSs, we propose the FogStore system. FogStore manages the needed adaptations in replica placement and consistency management transparently, so that existing DDSs can be plugged into the system. To show the benefits of FogStore, we perform a set of evaluations using the Yahoo Cloud Serving Benchmark.

Connected through hyperedge HE-1 (induced by source paper "challenges in designing edge based middlewares for the internet of things a survey"):
  with members:
    - "cefiot a fault tolerant iot architecture for edge and cloud"
    - "foggis fog computing for geospatial big data analytics"
    - "distributed scheduling of event analytics across edge and cloud"
    - "task allocation for distributed stream processing"
    - "cloud4iot a heterogeneous distributed and autonomic cloud platform for the iot"

Connected through hyperedge HE-2 (induced by source paper "elfstore a resilient data storage service for federated edge and fog resources"):
  with members:
    - "violet a large scale virtual environment for internet of things"
    - "mathbb echo an adaptive orchestration platform for hybrid dataflows across cloud and edge"
    - "ipfs content addressed versioned p2p file system"
    - "sensing as a service model for smart cities supported by internet of things"

Connected through hyperedge HE-3 (induced by source paper "how to place your apps in the fog state of the art and open challenges"):
  with members:
    - "a survey of energy efficiency in sdn software based methods and optimization models"
    - "online placement of multi component applications in edge computing environments"
    - "computing resource allocation in three tier iot fog networks a joint optimization approach combining stackelberg game and matching"

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)