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 "stack summarizing control flow analysis of higher order programs"):
  Abstract: Two sinks drain precision from higher-order flow analyses: (1) merging of argument values upon procedure call and (2) merging of return values upon procedure return. To combat the loss of precision, these two sinks have been addressed independently. In the case of procedure calls, abstract garbage collection reduces argument merging; while in the case of procedure returns, context-free approaches eliminate return value merging. It is natural to expect a combined analysis could enjoy the mutually beneficial interaction between the two approaches. The central contribution of this work is a direct product of abstract garbage collection with context-free analysis. The central challenge to overcome is the conflict between the core constraint of a pushdown system and the needs of garbage collection: a pushdown system can only see the top of the stack, yet garbage collection needs to see the entire stack during a collection. To make the direct product computable, we develop "stack summaries," a method for tracking stack properties at each control state in a pushdown analysis of higher-order programs.

Includes members:
  Member "pushdown control flow analysis of higher order programs":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "abstracting definitional interpreters functional pearl")
  Member "abstracting abstract machines":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "skeletal semantics and their interpretations")

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.PL(Programming Languages)