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: "assessment model for opportunistic routing"
  Abstract: This paper proposes an assessment model, based on a new taxonomy, which comprises an evaluation guideline with performance metrics and experimental setup to aid designers in evaluating solutions through fair comparisons. Simulation results are provided based on the proposed model considering Epidemic, PROPHET, Bubble Rap, and Spray and Wait, and showing how they perform under the same set of metrics and scenario

Connected through hyperedge HE-1 (induced by source paper "impact of human behavior on social opportunistic forwarding"):
  with members:
    - "improving the delivery rate of digital inclusion applications for amazon riverside communities by using an integrated bluetooth dtn architecture"
    - "social aware opportunistic routing the new trend"
    - "social aware opportunistic routing protocol based on user s interactions and interests"
    - "socialdtn a dtn implementation for digital and social inclusion"
    - "opportunistic routing based on daily routines"
    - "assessment model for opportunistic routing"

Connected through hyperedge HE-2 (induced by source paper "social aware forwarding in opportunistic wireless networks content awareness or obliviousness"):
  with members:
    - "social aware opportunistic routing the new trend"
    - "social aware opportunistic routing protocol based on user s interactions and interests"
    - "opportunistic routing based on daily routines"
    - "assessment model for opportunistic routing"

Connected through hyperedge HE-3 (induced by source paper "social aware opportunistic routing protocol based on user s interactions and interests"):
  with members:
    - "social aware opportunistic routing the new trend"
    - "opportunistic routing based on daily routines"
    - "assessment model for opportunistic routing"

Connected through hyperedge HE-4 (induced by source paper "social aware opportunistic routing the new trend"):
  with members:
    - "opportunistic routing based on daily routines"
    - "assessment model for opportunistic routing"

Connected through hyperedge HE-5 (induced by source paper "opportunistic routing based on daily routines"):
  with members:
    - "assessment model for opportunistic routing"

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.NI(Networking and Internet Architecture)