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: "utility computing and global grids"
  Abstract: This chapter focuses on the use of Grid technologies to achieve utility computing. An overview of how Grids can support utility computing is first presented through the architecture of Utility Grids. Then, utility-based resource allocation is described in detail at each level of the architecture. Finally, some industrial solutions for utility computing are discussed.

Connected through hyperedge HE-1 (induced by source paper "delivering it as a utility a systematic review"):
  with members:
    - "service level agreement sla in utility computing systems"
    - "sla oriented resource provisioning for cloud computing challenges architecture and solutions"
    - "market oriented cloud computing vision hype and reality for delivering it services as computing utilities"
    - "cloud computing and grid computing 360 degree compared"
    - "the gridbus toolkit for service oriented grid and utility computing an overview and status report"
    - "economic based distributed resource management and scheduling for grid computing"
    - "a deadline and budget constrained cost time optimisation algorithm for scheduling task farming applications on global grids"
    - "nimrod g an architecture for a resource management and scheduling system in a global computational grid"

Connected through hyperedge HE-2 (induced by source paper "service level agreement sla in utility computing systems"):
  with members:
    - "cloudbus toolkit for market oriented cloud computing"
    - "modeling and simulation of scalable cloud computing environments and the cloudsim toolkit challenges and opportunities"
    - "the gridbus toolkit for service oriented grid and utility computing an overview and status report"

Connected through hyperedge HE-3 (induced by source paper "integrated green cloud computing architecture"):
  with members:
    - "a taxonomy and survey of energy efficient data centers and cloud computing systems"

Connected through hyperedge HE-4 (induced by source paper "sla oriented resource provisioning for cloud computing challenges architecture and solutions"):
  with members:
    - "aneka a software platform for net based cloud computing"

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)