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: "conjunctive query answering for the description logic shiq"
  Abstract: Conjunctive queries play an important role as an expressive query language for Description Logics (DLs). Although modern DLs usually provide for transitive roles, conjunctive query answering over DL knowledge bases is only poorly understood if transitive roles are admitted in the query. In this paper, we consider unions of conjunctive queries over knowledge bases formulated in the prominent DL SHIQ and allow transitive roles in both the query and the knowledge base. We show decidability of query answering in this setting and establish two tight complexity bounds: regarding combined complexity, we prove that there is a deterministic algorithm for query answering that needs time single exponential in the size of the KB and double exponential in the size of the query, which is optimal. Regarding data complexity, we prove containment in co-NP.

Connected through hyperedge HE-1 (induced by source paper "satisfiability and query answering in description logics with global and local cardinality constraints"):
  with members:
    - "data complexity of the two variable fragment with counting quantifiers"
    - "complexity results and practical algorithms for logics in knowledge representation"
    - "the complexity of reasoning with cardinality restrictions and nominals in expressive description logics"

Connected through hyperedge HE-2 (induced by source paper "uncovering hidden semantics of set information in knowledge bases"):
  with members:
    - "cardinal virtues extracting relation cardinalities from text"
    - "paris probabilistic alignment of relations instances and schema"

Connected through hyperedge HE-3 (induced by source paper "deciding the loosely guarded fragment and querying its horn fragment using resolution"):
  with members:
    - "querying the guarded fragment"

Connected through hyperedge HE-4 (induced by source paper "the data complexity of description logic ontologies"):
  with members:
    - "a dichotomy theorem for nonuniform csps"
    - "the proof of csp dichotomy conjecture"
    - "rewritability in monadic disjunctive datalog mmsnp and expressive description logics"
    - "querying the guarded fragment"
    - "ontology based data access a study through disjunctive datalog csp and mmsnp"
    - "description logic tboxes model theoretic characterizations and rewritability"
    - "the dl lite family and relations"
    - "a characterisation of first order constraint satisfaction problems"

Connected through hyperedge HE-5 (induced by source paper "inseparability and conservative extensions of description logic ontologies a survey"):
  with members:
    - "query based entailment and inseparability for alc ontologies full version"
    - "ontology based data access a study through disjunctive datalog csp and mmsnp"
    - "the logical difference for the lightweight description logic el"
    - "reasoning over ontologies with hidden content the import by query approach"
    - "foundations for uniform interpolation and forgetting in expressive description logics"
    - "description logic tboxes model theoretic characterizations and rewritability"
    - "variable forgetting in reasoning about knowledge"
    - "the dl lite family and relations"

Connected through hyperedge HE-6 (induced by source paper "a practical acyclicity notion for query answering over horn mathcal sriq ontologies"):
  with members:
    - "introducing nominals to the combined query answering approaches for el"
    - "acyclicity notions for existential rules and their application to query answering in ontologies"
    - "nominals inverses counting and conjunctive queries or why infinity is your friend"

Connected through hyperedge HE-7 (induced by source paper "converting instance checking to subsumption a rethink for object queries over practical ontologies"):
  with members:
    - "extract abox modules for efficient ontology querying"
    - "hypertableau reasoning for description logics"
    - "complexity results and practical algorithms for logics in knowledge representation"
    - "reasoning with individuals for the description logic shiq"

Connected through hyperedge HE-8 (induced by source paper "combining existential rules and transitivity next steps"):
  with members:
    - "acyclicity notions for existential rules and their application to query answering in ontologies"

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.AI(Artificial Intelligence)