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: "1 bend rac drawings of 1 planar graphs"
  Abstract: A graph is 1-planar if it has a drawing where each edge is crossed at most once. A drawing is RAC (Right Angle Crossing) if the edges cross only at right angles. The relationships between 1-planar graphs and RAC drawings have been partially studied in the literature. It is known that there are both 1-planar graphs that are not straight-line RAC drawable and graphs that have a straight-line RAC drawing but that are not 1-planar. Also, straight-line RAC drawings always exist for IC-planar graphs, a subclass of 1-planar graphs. One of the main questions still open is whether every 1-planar graph has a RAC drawing with at most one bend per edge. We positively answer this question.

Connected through hyperedge HE-1 (induced by source paper "k p planarity a generalization of hybrid planarity"):
  with members:
    - "a survey on graph drawing beyond planarity"
    - "nic planar graphs"
    - "nodetrix planarity testing with small clusters"
    - "an annotated bibliography on 1 planarity"
    - "computing nodetrix representations of clustered graphs"
    - "recognizing and drawing ic planar graphs"
    - "intersection link representations of graphs"

Connected through hyperedge HE-2 (induced by source paper "ortho polygon visibility representations of embedded graphs"):
  with members:
    - "parameterized complexity of 1 planarity"
    - "an annotated bibliography on 1 planarity"
    - "simultaneous visibility representations of plane st graphs using l shapes"
    - "on 4 map graphs and 1 planar graphs and their recognition problem"
    - "on partitioning the edges of 1 plane graphs"
    - "l visibility drawings of ic planar graphs"
    - "1 visibility representations of 1 planar graphs"
    - "bar 1 visibility graphs and their relation to other nearly planar graphs"

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.CG(Computational Geometry)