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: "mpich g2 a grid enabled implementation of the message passing interface"
  Abstract: Application development for distributed computing "Grids" can benefit from tools that variously hide or enable application-level management of critical aspects of the heterogeneous environment. As part of an investigation of these issues, we have developed MPICH-G2, a Grid-enabled implementation of the Message Passing Interface (MPI) that allows a user to run MPI programs across multiple computers, at the same or different sites, using the same commands that would be used on a parallel computer. This library extends the Argonne MPICH implementation of MPI to use services provided by the Globus Toolkit for authentication, authorization, resource allocation, executable staging, and I/O, as well as for process creation, monitoring, and control. Various performance-critical operations, including startup and collective operations, are configured to exploit network topology information. The library also exploits MPI constructs for performance management; for example, the MPI communicator construct is used for application-level discovery of, and adaptation to, both network topology and network quality-of-service mechanisms. We describe the MPICH-G2 design and implementation, present performance results, and review application experiences, including record-setting distributed simulations.

Connected through hyperedge HE-1 (induced by source paper "a comparative study of association rule mining algorithms on grid and cloud platform"):
  with members:
    - "cloud computing and grid computing 360 degree compared"
    - "the anatomy of the grid enabling scalable virtual organizations"

Connected through hyperedge HE-2 (induced by source paper "a taxonomy of performance prediction systems in the parallel and distributed computing grids"):
  with members:
    - "a taxonomy of data grids for distributed data sharing management and processing"
    - "using regression techniques to predict large data transfers"
    - "gridsim a toolkit for the modeling and simulation of distributed resource management and scheduling for grid computing"

Connected through hyperedge HE-3 (induced by source paper "a taxonomy of performance prediction systems in the parallel distributed grids"):
  with members:
    - "using regression techniques to predict large data transfers"
    - "gridsim a toolkit for the modeling and simulation of distributed resource management and scheduling for grid computing"

Connected through hyperedge HE-4 (induced by source paper "efficient and reliable network tomography in heterogeneous networks using bittorrent broadcasts and clustering algorithms"):
  with members:
    - "modularity clustering is force directed layout"

Connected through hyperedge HE-5 (induced by source paper "high performance cosmological simulations on a grid of supercomputers"):
  with members:
    - "high performance gravitational n body simulations on a planet wide distributed supercomputer"
    - "a lightweight communication library for distributed computing"

Connected through hyperedge HE-6 (induced by source paper "cluster based load balancing algorithms for grids"):
  with members:
    - "the anatomy of the grid enabling scalable virtual organizations"

Connected through hyperedge HE-7 (induced by source paper "qr factorization of tall and skinny matrices in a grid computing environment"):
  with members:
    - "a class of parallel tiled linear algebra algorithms for multicore architectures"

Connected through hyperedge HE-8 (induced by source paper "cloud computing and grid computing 360 degree compared"):
  with members:
    - "accelerating large scale data exploration through data diffusion"
    - "the community authorization service status and future"
    - "a community authorization service for group collaboration"
    - "the anatomy of the grid enabling scalable virtual organizations"
    - "nimrod g an architecture for a resource management and scheduling system in a global computational grid"

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)