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: "preprint deja vu"
  Abstract: Twenty‐five years ago, in August 1991, I spent a couple of afternoons at Los Alamos National Laboratory writing some simple software that enabled a small group of physicists to share drafts of their articles via automated email transactions with a central repository. Within a few years, the site migrated to the nascent WorldWideWeb as arXiv.org, and experienced both expansion in coverage and heavy growth in usage that continues to this day. In 1998, I gave a talk to a group of biologists—including David Lipman, Pat Brown, and Michael Eisen—at a meeting at Cold Spring Harbor Laboratory (CSHL) to describe the sharing of articles “pre‐publication” by physicists. The talk was met with some enthusiasm and prompted the “e‐biomed” proposal in the following spring by then NIH director Harold Varmus. He encouraged the creation of an NIH‐run electronic archive for all biomedical research articles, including both a preprint server and an archive of published peer‐reviewed articles, which generated significant discussion.

Connected through hyperedge HE-1 (induced by source paper "hep th"):
  with members:
    - "linguistic matrix theory"
    - "an empirical study on large scale text classification with skip gram embeddings"
    - "character level convolutional networks for text classification"
    - "text understanding from scratch"
    - "word2vec explained deriving mikolov et al s negative sampling word embedding method"
    - "efficient estimation of word representations in vector space"
    - "distributed representations of words and phrases and their compositionality"
    - "a fully automatic problem solver with human style output"

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.DL(Digital Libraries)