human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "on facebook most ties are weak"):
  Abstract: Strong ties connect individuals in the same community; weak ties connect individuals in different communities.

Includes members:
  Member "the role of social networks in information diffusion":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "deep learning approach on information diffusion in heterogeneous networks")
  Member "a large scale community structure analysis in facebook":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "uncovering complex overlapping pattern of communities in large scale social networks")
  Member "a novel measure of edge centrality in social networks":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "novel edge and density metrics for link cohesion")
  Member "crawling facebook for social network analysis purposes":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "dynamic graph operations a consistent non blocking approach")
  Member "four degrees of separation":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "diffusion improves graph learning")
  Member "weak ties subtle role of information diffusion in online social networks":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "an agent based model for emotion contagion and competition in online social media")

Question: Please tell me which class the source paper 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.SI(Social and Information Networks)