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 "qratpre effective qbf preprocessing via strong redundancy properties"):
  Abstract: We present version 2.0 of QRATPre+, a preprocessor for quantified Boolean formulas (QBFs) based on the \(\mathsf {QRAT} \) proof system and its generalization \(\mathsf {QRAT}^{+} \). These systems rely on strong redundancy properties of clauses and universal literals. QRATPre+ is the first implementation of these redundancy properties in \(\mathsf {QRAT} \) and \(\mathsf {QRAT}^{+} \) used to simplify QBFs in preprocessing. It is written in C and features an API for easy integration in other QBF tools. We present implementation details and report on experimental results demonstrating that QRATPre+ improves upon the power of state-of-the-art preprocessors and solvers.

Includes members:
  Member "expansion based qbf solving without recursion":
    also connected through other hyperedges:
      (none)
  Member "evaluating qbf solvers quantifier alternations matter":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "te eth lower bounds for qbfs of bounded treewidth")
  Member "on expansion and resolution in cegar based qbf solving":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "understanding and extending incremental determinization for 2qbf")
  Member "textsf qrat generalizing qrat by a more powerful qbf redundancy property":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "inconsistency proofs for asp the asp drupe format")
  Member "depqbf 6 0 a search based qbf solver beyond traditional qcdcl":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "solving advanced argumentation problems with answer set programming")
  Member "the qbf gallery":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "evaluating qbf solvers quantifier alternations matter")
  Member "clause term resolution and learning in the evaluation of quantified boolean formulas":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "evaluating qbf solvers quantifier alternations matter")

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.LO(Logic in Computer Science)