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 "seeing through the smoke a world wide comparative study of e cigarette flavors brands and markets using data from reddit and twitter"):
  Abstract: The growing popularity of E-cigarettes, an alternative to cigarettes, has motivated us to study trends of the brands, flavors and online market activity using posts from Reddit and Twitter. The main motivation for this world-wide study is to emphasize the difference that laws and regulations have on the usage and availability of different flavors and brands of vapes in different countries. Data has been obtained from subreddits belonging to e-cigarette communities from Australia, Canada, Europe, and the UK. Extensive cleaning of data, and rigorous text mining operations provide varying results for different countries. Varying results have been obtained from Reddit and Twitter since they provide different atmospheres to the users.

Includes members:
  Member "tracking illicit drug dealing and abuse on instagram using multimodal analysis":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "a total error framework for digital traces of humans")
  Member "fine grained mining of illicit drug use patterns using social multimedia data from instagram":
    also connected through other hyperedges:
      (none)

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)