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: "rewriting ontological queries into small nonrecursive datalog programs"
  Abstract: We consider the setting of ontological database access, where an Abox is given in form of a relational database D and where a Boolean conjunctive query q has to be evaluated against D modulo a Tbox T formulated in DL-Lite or Linear Datalog+/-. It is well-known that (T,q) can be rewritten into an equivalent nonrecursive Datalog program P that can be directly evaluated over D. However, for Linear Datalog? or for DL-Lite versions that allow for role inclusion, the rewriting methods described so far result in a nonrecursive Datalog program P of size exponential in the joint size of T and q. This gives rise to the interesting question of whether such a rewriting necessarily needs to be of exponential size. In this paper we show that it is actually possible to translate (T,q) into a polynomially sized equivalent nonrecursive Datalog program P.

Connected through hyperedge HE-1 (induced by source paper "polynomial rewritings from expressive description logics with closed predicates to variants of datalog"):
  with members:
    - "nested regular path queries in description logics"
    - "ontology based data access a study through disjunctive datalog csp and mmsnp"

Connected through hyperedge HE-2 (induced by source paper "a dichotomy for homomorphism closed queries on probabilistic graphs"):
  with members:
    - "boundedness of conjunctive regular path queries"
    - "model counting for conjunctive queries without self joins"
    - "tractable lineages on treelike instances limits and extensions"
    - "ontology based data access a study through disjunctive datalog csp and mmsnp"

Connected through hyperedge HE-3 (induced by source paper "ontology mediated queries combined complexity and succinctness of rewritings via circuit complexity"):
  with members:
    - "the complexity of ontology based data access with owl 2 ql and bounded treewidth queries"
    - "theoretically optimal datalog rewritings for owl 2 ql ontology mediated queries"
    - "datalog rewritability of disjunctive datalog programs and its applications to ontology reasoning"
    - "tree like queries in owl 2 ql succinctness and complexity results"
    - "sound complete and minimal ucq rewriting for existential rules"
    - "ontology based data access a study through disjunctive datalog csp and mmsnp"
    - "exponential lower bounds and separation for query rewriting"
    - "description logic tboxes model theoretic characterizations and rewritability"

Connected through hyperedge HE-4 (induced by source paper "the power of non ground rules in answer set programming"):
  with members:
    - "asperix a first order forward chaining approach for answer set computing"
    - "complex optimization in answer set programming"
    - "towards automated integration of guess and check programs in answer set programming a meta interpreter and applications"
    - "unfolding partiality and disjunctions in stable model semantics"
    - "stable models and an alternative logic programming paradigm"

Connected through hyperedge HE-5 (induced by source paper "tree like queries in owl 2 ql succinctness and complexity results"):
  with members:
    - "on the succinctness of query rewriting over owl 2 ql ontologies with shallow chases"
    - "exponential lower bounds and separation for query rewriting"
    - "the dl lite family and relations"

Connected through hyperedge HE-6 (induced by source paper "on the succinctness of query rewriting over owl 2 ql ontologies with shallow chases"):
  with members:
    - "exponential lower bounds and separation for query rewriting"
    - "the dl lite family and relations"

Connected through hyperedge HE-7 (induced by source paper "query rewriting and optimization for ontological databases"):
  with members:
    - "exponential lower bounds and separation for query rewriting"
    - "hypertree decompositions and tractable queries"

Connected through hyperedge HE-8 (induced by source paper "waterfowl a compact self indexed rdf store with inference enabled dictionaries"):
  with members:
    - "the wavelet trie maintaining an indexed sequence of strings in compressed space"

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)