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: "academic cloud computing research five pitfalls and five opportunities"
  Abstract: This discussion paper argues that there are five fundamental pitfalls, which can restrict academics from conducting cloud computing research at the infrastructure level, which is currently where the vast majority of academic research lies. Instead academics should be conducting higher risk research, in order to gain understanding and open up entirely new areas. #R##N#We call for a renewed mindset and argue that academic research should focus less upon physical infrastructure and embrace the abstractions provided by clouds through five opportunities: user driven research, new programming models, PaaS environments, and improved tools to support elasticity and large-scale debugging. The objective of this paper is to foster discussion, and to define a roadmap forward, which will allow academia to make longer-term impacts to the cloud computing community.

Connected through hyperedge HE-1 (induced by source paper "feasibility of fog computing"):
  with members:
    - "cloud benchmarking for performance"
    - "sla oriented resource provisioning for cloud computing challenges architecture and solutions"

Connected through hyperedge HE-2 (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"
    - "experiences of using a hybrid cloud to construct an environmental virtual observatory"
    - "vm mad a cloud cluster software for service oriented academic environments"

Connected through hyperedge HE-3 (induced by source paper "doclite a docker based lightweight cloud benchmarking tool"):
  with members:
    - "cloud services brokerage a survey and research roadmap"
    - "analysis of docker security"
    - "an introduction to docker for reproducible research with examples from the r environment"
    - "cloud benchmarking for performance"
    - "parallel simulations for analysing portfolios of catastrophic event risk"
    - "on a catalogue of metrics for evaluating commercial cloud services"

Connected through hyperedge HE-4 (induced by source paper "challenges and opportunities in edge computing"):
  with members:
    - "doclite a docker based lightweight cloud benchmarking tool"
    - "fog computing focusing on mobile users at the edge"
    - "analysis of docker security"
    - "cloud benchmarking for performance"

Connected through hyperedge HE-5 (induced by source paper "cloud services brokerage a survey and research roadmap"):
  with members:
    - "cloud benchmarking for performance"
    - "the cloud adoption toolkit supporting cloud adoption decisions in the enterprise"

Connected through hyperedge HE-6 (induced by source paper "budget constrained execution of multiple bag of tasks applications on the cloud"):
  with members:
    - "executing bag of distributed tasks on the cloud investigating the trade offs between performance and cost"

Connected through hyperedge HE-7 (induced by source paper "task scheduling on the cloud with hard constraints"):
  with members:
    - "executing bag of distributed tasks on the cloud investigating the trade offs between performance and cost"

Connected through hyperedge HE-8 (induced by source paper "the making of cloud applications an empirical study on software development for the cloud"):
  with members:
    - "jcloudscale closing the gap between iaas and paas"
    - "patterns in the chaos a study of performance variation and predictability in public iaas clouds"
    - "elastic remote methods"
    - "research challenges for enterprise 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)