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: "testing simultaneous planarity when the common graph is 2 connected"
  Abstract: Two planar graphs G1 and G2 sharing some vertices and edges are `simultaneously planar' if they have planar drawings such that a shared vertex [edge] is represented by the same point [curve] in both drawings. It is an open problem whether simultaneous planarity can be tested efficiently. We give a linear-time algorithm to test simultaneous planarity when the two graphs share a 2-connected subgraph. Our algorithm extends to the case of k planar graphs where each vertex [edge] is either common to all graphs or belongs to exactly one of them.

Connected through hyperedge HE-1 (induced by source paper "atomic embeddability clustered planarity and thickenability"):
  with members:
    - "recognizing weak embeddings of graphs"
    - "hanani tutte for approximating maps of graphs"
    - "clustered planarity with pipes"
    - "recognizing weakly simple polygons"
    - "detecting weakly simple polygons"
    - "simultaneous embedding edge orderings relative positions cutvertices"
    - "clustered planarity testing revisited"
    - "simultaneous embedding of planar graphs"

Connected through hyperedge HE-2 (induced by source paper "the quasefe problem"):
  with members:
    - "a survey on graph drawing beyond planarity"
    - "simultaneous drawing of planar graphs with right angle crossings and few bends"
    - "simultaneous visibility representations of plane st graphs using l shapes"
    - "advancements on sefe and partitioned book embedding problems"
    - "simultaneous embedding of planar graphs"
    - "simultaneous pq ordering with applications to constrained embedding problems"
    - "on a tree and a path with no geometric simultaneous embedding"

Connected through hyperedge HE-3 (induced by source paper "on the mathcal np hardness of gracsim drawing and k sefe problems"):
  with members:
    - "simultaneous drawing of planar graphs with right angle crossings and few bends"
    - "simultaneous embeddings with few bends and crossings"
    - "simultaneous visibility representations of plane st graphs using l shapes"
    - "simultaneous embedding edge orderings relative positions cutvertices"
    - "drawing partially embedded and simultaneously planar graphs"
    - "sefe with no mapping via large induced outerplane graphs in plane graphs"
    - "advancements on sefe and partitioned book embedding problems"
    - "simultaneous embedding of planar graphs"

Connected through hyperedge HE-4 (induced by source paper "simultaneous orthogonal planarity"):
  with members:
    - "simultaneous drawing of planar graphs with right angle crossings and few bends"
    - "simultaneous embedding edge orderings relative positions cutvertices"
    - "advancements on sefe and partitioned book embedding problems"
    - "disconnectivity and relative positions in simultaneous embeddings"
    - "simultaneous pq ordering with applications to constrained embedding problems"
    - "simultaneous interval graphs"

Connected through hyperedge HE-5 (induced by source paper "simultaneous drawing of planar graphs with right angle crossings and few bends"):
  with members:
    - "simultaneous embedding edge orderings relative positions cutvertices"
    - "two page book embeddings of 4 planar graphs"
    - "simultaneous embedding of planar graphs"
    - "on a tree and a path with no geometric simultaneous embedding"
    - "simultaneous embedding of a planar graph and its dual on the grid"

Connected through hyperedge HE-6 (induced by source paper "simultaneous embedding edge orderings relative positions cutvertices"):
  with members:
    - "a new perspective on clustered planarity as a combinatorial embedding problem"
    - "disconnectivity and relative positions in simultaneous embeddings"
    - "simultaneous embedding of planar graphs"
    - "simultaneous pq ordering with applications to constrained embedding problems"

Connected through hyperedge HE-7 (induced by source paper "beyond level planarity"):
  with members:
    - "simultaneous pq ordering with applications to constrained embedding problems"

Connected through hyperedge HE-8 (induced by source paper "drawing partially embedded and simultaneously planar graphs"):
  with members:
    - "simultaneous embeddings with few bends and crossings"
    - "adding one edge to planar graphs makes crossing number and 1 planarity hard"
    - "a kuratowski type theorem for planarity of partially embedded graphs"
    - "simultaneous embedding of a planar graph and its dual on the grid"

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)