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: "planar l drawings of directed graphs"
  Abstract: We study planar drawings of directed graphs in the L-drawing standard. We provide necessary conditions for the existence of these drawings and show that testing for the existence of a planar L-drawing is an NP-complete problem. Motivated by this result, we focus on upward-planar L-drawings. We show that directed st-graphs admitting an upward- (resp. upward-rightward-) planar L-drawing are exactly those admitting a bitonic (resp. monotonically increasing) st-ordering. We give a linear-time algorithm that computes a bitonic (resp. monotonically increasing) st-ordering of a planar st-graph or reports that there exists none.

Connected through hyperedge HE-1 (induced by source paper "upward book embeddings of st graphs"):
  with members:
    - "upward planar morphs"
    - "windrose planarity embedding graphs with direction constrained edges"
    - "crossing minimization for 1 page and 2 page drawings of graphs with bounded treewidth"
    - "upward partitioned book embeddings"
    - "arc diagrams flip distances and hamiltonian triangulations"
    - "the book thickness of 1 planar graphs is constant"
    - "intersection link representations of graphs"
    - "two page book embeddings of 4 planar graphs"

Connected through hyperedge HE-2 (induced by source paper "extending upward planar graph drawings"):
  with members:
    - "upward book embeddings of st graphs"
    - "upward planar morphs"
    - "windrose planarity embedding graphs with direction constrained edges"
    - "ordered level planarity geodesic planarity and bi monotonicity"
    - "the partial visibility representation extension problem"
    - "beyond level planarity"
    - "extending partial representations of circle graphs"
    - "extending partial representations of subclasses of chordal graphs"

Connected through hyperedge HE-3 (induced by source paper "computing k modal embeddings of planar digraphs"):
  with members:
    - "windrose planarity embedding graphs with direction constrained edges"
    - "turning cliques into paths to achieve planarity"
    - "nodetrix planarity testing with small clusters"
    - "ordered level planarity geodesic planarity and bi monotonicity"
    - "computing nodetrix representations of clustered graphs"
    - "beyond level planarity"

Connected through hyperedge HE-4 (induced by source paper "universal slope sets for upward planar drawings"):
  with members:
    - "1 bend upward planar drawings of sp digraphs"
    - "bitonic st orderings for upward planar graphs"
    - "on the total number of bends for planar octilinear drawings"
    - "graph drawings with one bend and few slopes"
    - "planar octilinear drawings with one bend per edge"

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.DS(Data Structures and Algorithms)