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: "daily deals prediction social diffusion and reputational ramifications"
  Abstract: Daily deal sites have become the latest Internet sensation, providing discounted offers to customers for restaurants, ticketed events, services, and other items. We begin by undertaking a study of the economics of daily deals on the web, based on a dataset we compiled by monitoring Groupon and LivingSocial sales in 20 large cities over several months. We use this dataset to characterize deal purchases; glean insights about operational strategies of these firms; and evaluate customers' sensitivity to factors such as price, deal scheduling, and limited inventory. We then marry our daily deals dataset with additional datasets we compiled from Facebook and Yelp users to study the interplay between social networks and daily deal sites. First, by studying user activity on Facebook while a deal is running, we provide evidence that daily deal sites benefit from significant word-of-mouth effects during sales events, consistent with results predicted by cascade models. Second, we consider the effects of daily deals on the longer-term reputation of merchants, based on their Yelp reviews before and after they run a daily deal. Our analysis shows that while the number of reviews increases significantly due to daily deals, average rating scores from reviewers who mention daily deals are 10% lower than scores of their peers on average.

Connected through hyperedge HE-1 (induced by source paper "analyzing and modeling special offer campaigns in location based social networks"):
  with members:
    - "geo spotting mining online location based services for optimal retail store placement"

Connected through hyperedge HE-2 (induced by source paper "designing markets for daily deals"):
  with members:
    - "the groupon effect on yelp ratings a root cause analysis"
    - "eliciting forecasts from self interested experts scoring rules for decision makers"

Connected through hyperedge HE-3 (induced by source paper "optimal groupon allocations"):
  with members:
    - "the groupon effect on yelp ratings a root cause analysis"

Connected through hyperedge HE-4 (induced by source paper "real time bid optimization for group buying ads"):
  with members:
    - "the groupon effect on yelp ratings a root cause analysis"
    - "selective call out and real time bidding"
    - "bidding for representative allocations for display advertising"

Connected through hyperedge HE-5 (induced by source paper "does a daily deal promotion signal a distressed business an empirical investigation of small business survival"):
  with members:
    - "the groupon effect on yelp ratings a root cause analysis"

Connected through hyperedge HE-6 (induced by source paper "the warm start bias of yelp ratings"):
  with members:
    - "do starting and ending effects in fixed price group buying differ"

Connected through hyperedge HE-7 (induced by source paper "chinese restaurant game part ii applications to wireless networking cloud computing and online social networking"):
  with members:
    - "chinese restaurant game part i theory of learning with negative network externality"

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)