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: "relational parametricity and control"
  Abstract: We study the equational theory of Parigot's second-order#N#λμ-calculus in connection with a call-by-name continuation-passing#N#style (CPS) translation into a fragment of the second-order λ-calculus.#N#It is observed that the relational parametricity on the target calculus induces#N#a natural notion of equivalence on the λμ-terms. On the other hand,#N#the unconstrained relational parametricity on the λμ-calculus turns#N#out to be inconsistent with this CPS semantics. Following these facts, we#N#propose to formulate the relational parametricity on the λμ-calculus#N#in a constrained way, which might be called ``focal parametricity''.

Connected through hyperedge HE-1 (induced by source paper "induction by coinduction and control operators in call by name"):
  with members:
    - "graph logics with rational relations"
    - "call by value and call by name dual calculi with inductive and coinductive types"
    - "resource usage analysis for the pi calculus"

Connected through hyperedge HE-2 (induced by source paper "relational parametricity for computational effects"):
  with members:
    - "logical relations for monadic types"
    - "linear abadi and plotkin logic"

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.PL(Programming Languages)