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: "on facebook most ties are weak"
  Abstract: Strong ties connect individuals in the same community; weak ties connect individuals in different communities.

Connected through hyperedge HE-1 (induced by source paper "the history of digital spam"):
  with members:
    - "online human bot interactions detection estimation and characterization"
    - "the darpa twitter bot challenge"
    - "the rise of social bots"
    - "manipulation and abuse on social media by emilio ferrara with ching man au yeung as coordinator"
    - "uncovering social network sybils in the wild"
    - "an experimental comparison of naive bayesian and keyword based anti spam filtering with personal e mail messages"

Connected through hyperedge HE-2 (induced by source paper "inferring the strength of social ties a community driven approach"):
  with members:
    - "romantic partnerships and the dispersion of social ties a network analysis of relationship status on facebook"

Connected through hyperedge HE-3 (induced by source paper "link transmission centrality in large scale social networks"):
  with members:
    - "detecting global bridges in networks"
    - "interplay between social influence and network centrality a comparative study on shapley centrality and single node influence centrality"
    - "understanding the influence of all nodes in a network"
    - "a novel measure of edge centrality in social networks"

Connected through hyperedge HE-4 (induced by source paper "latent space model for multi modal social data"):
  with members:
    - "structure and inference in annotated networks"
    - "analysis of a heterogeneous social network of humans and cultural objects"
    - "quantifying the effect of sentiment on information diffusion in social media"
    - "online popularity and topical interests through the lens of instagram"
    - "the bursty dynamics of the twitter information network"
    - "can cascades be predicted"
    - "traveling trends social butterflies or frequent fliers"
    - "scalable text and link analysis with mixed topic link models"

Connected through hyperedge HE-5 (induced by source paper "social politics agenda setting and political communication on social media"):
  with members:
    - "will sanders supporters jump ship for trump fine grained analysis of twitter followers"
    - "the rise of social bots"
    - "deciphering the 2016 u s presidential campaign in the twitter sphere a comparison of the trumpists and clintonists"
    - "manipulation and abuse on social media by emilio ferrara with ching man au yeung as coordinator"
    - "evolution of online user behavior during a social upheaval"
    - "the digital evolution of occupy wall street"
    - "traveling trends social butterflies or frequent fliers"
    - "the geospatial characteristics of a social movement communication network"

Connected through hyperedge HE-6 (induced by source paper "style in the age of instagram predicting success within the fashion industry using social media"):
  with members:
    - "online popularity and topical interests through the lens of instagram"
    - "clustering memes in social media streams"
    - "traveling trends social butterflies or frequent fliers"
    - "clustering memes in social media"
    - "trends in social media persistence and decay"

Connected through hyperedge HE-7 (induced by source paper "quantifying the effect of sentiment on information diffusion in social media"):
  with members:
    - "the rise of social bots"
    - "measuring emotional contagion in social media"
    - "on predictability of rare events leveraging social media a machine learning perspective"
    - "evolution of online user behavior during a social upheaval"
    - "can cascades be predicted"
    - "romantic partnerships and the dispersion of social ties a network analysis of relationship status on facebook"
    - "predicting successful memes using network and community structure"
    - "the digital evolution of occupy wall street"

Connected through hyperedge HE-8 (induced by source paper "measuring emotional contagion in social media"):
  with members:
    - "on predictability of rare events leveraging social media a machine learning perspective"
    - "the simple rules of social contagion"
    - "quantifying the effect of sentiment on information diffusion in social media"
    - "evolution of online user behavior during a social upheaval"
    - "can cascades be predicted"
    - "romantic partnerships and the dispersion of social ties a network analysis of relationship status on facebook"
    - "the digital evolution of occupy wall street"
    - "traveling trends social butterflies or frequent fliers"

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.SI(Social and Information Networks)