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: "dlv a system for declarative problem solving"
  Abstract: DLV is an efficient logic programming and non-monotonic reasoning (LPNMR) system with advanced knowledge representation mechanisms and interfaces to classic relational database systems. #R##N#Its core language is disjunctive datalog (function-free disjunctive logic programming) under the Answer Set Semantics with integrity constraints, both default and strong (or explicit) negation, and queries. Integer arithmetics and various built-in predicates are also supported. #R##N#In addition DLV has several frontends, namely brave and cautious reasoning, abductive diagnosis, consistency-based diagnosis, a subset of SQL3, planning with action languages, and logic programming with inheritance.

Connected through hyperedge HE-1 (induced by source paper "a framework for easing the development of applications embedding answer set programming"):
  with members:
    - "clingo asp control preliminary report"
    - "the dlv system for knowledge representation and reasoning"
    - "stable models and an alternative logic programming paradigm"

Connected through hyperedge HE-2 (induced by source paper "consistent query answers in the presence of universal constraints"):
  with members:
    - "complexity of consistent query answering in databases under cardinality based and incremental repair semantics"
    - "complexity and approximation of fixing numerical attributes in databases under integrity constraints"
    - "preferred answer sets for ordered logic programs"
    - "answer sets for consistent query answering in inconsistent databases"
    - "minimal change integrity maintenance using tuple deletions"

Connected through hyperedge HE-3 (induced by source paper "design and implementation of aggregate functions in the dlv system"):
  with members:
    - "the dlv system for knowledge representation and reasoning"
    - "a constructive semantic characterization of aggregates in asp"
    - "weight constraints as nested expressions"
    - "logic programs with monotone cardinality atoms"

Connected through hyperedge HE-4 (induced by source paper "the dlv system for knowledge representation and reasoning"):
  with members:
    - "unfolding partiality and disjunctions in stable model semantics"
    - "answer set planning under action costs"
    - "a logic programming approach to knowledge state planning ii the dlv k system"
    - "computing preferred answer sets by meta interpretation in answer set programming"
    - "a polynomial translation of logic programs with nested expressions into disjunctive logic programs preliminary report"
    - "disjunctive logic programs with inheritance"
    - "on properties of update sequences based on causal rejection"
    - "propositional satisfiability in answer set programming"

Connected through hyperedge HE-5 (induced by source paper "towards automated integration of guess and check programs in answer set programming a meta interpreter and applications"):
  with members:
    - "the dlv system for knowledge representation and reasoning"
    - "an abductive framework for computing knowledge base updates"
    - "on the expressibility of stable logic programming"
    - "diagnostic reasoning with a prolog"
    - "a logic programming approach to knowledge state planning ii the dlv k system"
    - "computing preferred answer sets by meta interpretation in answer set programming"
    - "on properties of update sequences based on causal rejection"
    - "conformant planning via symbolic model checking"

Connected through hyperedge HE-6 (induced by source paper "computing minimal models stable models and answer sets"):
  with members:
    - "computing stable models worst case performance estimates"
    - "stable models and an alternative logic programming paradigm"

Connected through hyperedge HE-7 (induced by source paper "answer set planning under action costs"):
  with members:
    - "a logic programming approach to knowledge state planning ii the dlv k system"
    - "conformant planning via symbolic model checking"
    - "smodels a system for answer set programming"

Connected through hyperedge HE-8 (induced by source paper "abductive logic programs with penalization semantics complexity and implementation"):
  with members:
    - "the dlv system for knowledge representation and reasoning"

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)