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: "hott formalisation in coq dependency graphs ml4pg"
  Abstract: This note is a response to Bas Spitter's email of 28 February 2014 about ML4PG: #R##N#"We (Jason actually) are adding dependency graphs to our HoTT library: this https URL#R##N#I seem to recall that finding the dependency graph was a main obstacle preventing machine learning to be used in Coq. However, you seem to have made progress on this. What tool are you using? this https URL ? Or another tool? Would it be easy to use your ML4PG on the HoTT library?" #R##N#This note gives explanation of how ML4PG can be used in the HoTT library and how ML4PG relates to the two kinds of Dependency graphs available in Coq.

Connected through hyperedge HE-1 (induced by source paper "deepalgebra an outline of a program"):
  with members:
    - "deepmath deep sequence models for premise selection"
    - "goal translation for a hammer for coq extended abstract"
    - "mizar 40 for mizar 40"
    - "proof pattern search in coq ssreflect"
    - "developments in formal proofs"
    - "theorem proving in large formal mathematics as an emerging ai field"

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.LO(Logic in Computer Science)