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 "tagging folksonomy co renaissance of manual indexing"):
  Abstract: This presentation was held at the  10th international Symposium for Information Science on June 1st 2007. The full paper and abstract can be found at http://arxiv.org/abs/cs/0701072

Includes members:
  Member "collaborative thesaurus tagging the wikipedia way":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "on the estimation and use of statistical modelling in information retrieval")
  Member "collaborative tagging as a tripartite network":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "folksonomication predicting tags for movies from plot synopses using emotion flow encoded neural network")
  Member "collaborative tagging and semiotic dynamics":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "a standardized project gutenberg corpus for statistical analysis of natural language and quantitative linguistics")

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.IR(Information Retrieval)