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: "conceptual modeling of a procurement process case study of rfp for public key infrastructure"
  Abstract: Procurement refers to a process resulting in delivery of goods or services within a set time period. The process includes aspects of purchasing, specifications to be met, and solicitation notifications as in the case of Request For Proposals (RFPs). Typically such an RFP is described in a verbal ad hoc fashion, in English, with tables and graphs, resulting in imprecise specifications of requirements. It has been proposed that BPMN diagrams be used to specify requirements to be included in RFP. This paper is a merger of three topics: (i) Procurement development with a focus on operational specification of RFP, (ii) Public key infrastructure (PKI) as an RFP subject, and (iii) Conceptual modeling that produces a diagram as a supplement to an RFP to clarify requirements more precisely than traditional tools such as natural language, tables, and ad hoc graphs.

Connected through hyperedge HE-1 (induced by source paper "five generic processes for behavior description in software engineering"):
  with members:
    - "existential ontology and thinging modeling in software engineering"
    - "toward maximum grip process modeling in software engineering"
    - "conceptual modeling of inventory management processes as a thinging machine"
    - "thinging machine applied to information leakage"
    - "thinging vs objectfying in software engineering"
    - "tracking systems as thinging machine a case study of a service company"
    - "petri nets and machines of things that flow"
    - "thinging for software engineers"

Connected through hyperedge HE-2 (induced by source paper "toward maximum grip process modeling in software engineering"):
  with members:
    - "existential ontology and thinging modeling in software engineering"
    - "conceptual modeling of inventory management processes as a thinging machine"
    - "thinging machine applied to information leakage"
    - "thinging vs objectfying in software engineering"
    - "tracking systems as thinging machine a case study of a service company"
    - "petri nets and machines of things that flow"
    - "thinging for software engineers"
    - "privacy things systematic approach to privacy and personal identifiable information"

Connected through hyperedge HE-3 (induced by source paper "thinging the use case model"):
  with members:
    - "thinging for computational thinking"
    - "existential ontology and thinging modeling in software engineering"
    - "toward maximum grip process modeling in software engineering"
    - "conceptual modeling of inventory management processes as a thinging machine"
    - "thinging machine applied to information leakage"
    - "tracking systems as thinging machine a case study of a service company"
    - "thinging for software engineers"

Connected through hyperedge HE-4 (induced by source paper "thinging as a way of modeling in poiesis applications in software engineering"):
  with members:
    - "software engineering modeling applied to english verb classification and poetry"

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.SE(Software Engineering)