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 "computing k modal embeddings of planar digraphs"):
  Abstract: Given a planar digraph $G$ and a positive even integer $k$, an embedding of $G$ in the plane is k-modal, if every vertex of $G$ is incident to at most $k$ pairs of consecutive edges with opposite orientations, i.e., the incoming and the outgoing edges at each vertex are grouped by the embedding into at most k sets of consecutive edges with the same orientation. In this paper, we study the $k$-Modality problem, which asks for the existence of a $k$-modal embedding of a planar digraph. This combinatorial problem is at the very core of a variety of constrained embedding questions for planar digraphs and flat clustered networks.

Includes members:
  Member "windrose planarity embedding graphs with direction constrained edges":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "upward book embeddings of st graphs")
  Member "turning cliques into paths to achieve planarity":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "simultaneous fpq ordering and hybrid planarity testing")
  Member "nodetrix planarity testing with small clusters":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "simultaneous fpq ordering and hybrid planarity testing")
  Member "planar l drawings of directed graphs":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "upward book embeddings of st graphs")
  Member "ordered level planarity geodesic planarity and bi monotonicity":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "extending upward planar graph drawings")
  Member "computing nodetrix representations of clustered graphs":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "c planarity testing of embedded clustered graphs with bounded dual carving width")
  Member "beyond level planarity":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "extending upward planar graph drawings")

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.DS(Data Structures and Algorithms)