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: "towards physarum robots computing and manipulating on water surface"
  Abstract: Plasmodium of Physarum polycephalum is an ideal biological substrate for implementing concurrent and parallel computation, including combinatorial geometry and optimization on graphs. The scoping experiments on Physarum computing in conditions of minimal friction, on the water surface were performed. The laboratory and computer experimental results show that plasmodium of Physarum is capable of computing a basic spanning tree and manipulating of light-weight objects. We speculate that our results pave the pathways towards the design and implementation of amorphous biological robots.

Connected through hyperedge HE-1 (induced by source paper "a modified physarum inspired model for the user equilibrium traffic assignment problem"):
  with members:
    - "logical modelling of physarum polycephalum"

Connected through hyperedge HE-2 (induced by source paper "living wires effects of size and coating of gold nanoparticles in altering the electrical properties of physarum polycephalum and lettuce seedlings"):
  with members:
    - "slime mould memristors"
    - "towards plant wires"
    - "towards slime mould colour sensor recognition of colours by physarum polycephalum"
    - "routing of physarum polycephalum signals using simple chemicals"
    - "on the internalisation intraplasmodial carriage and excretion of metallic nanoparticles in the slime mould physarum polycephalum"

Connected through hyperedge HE-3 (induced by source paper "towards lateral inhibition and collective perception in unorganised non neural systems"):
  with members:
    - "slime mould memristors"
    - "the emergence and dynamical evolution of complex transport networks from simple low level behaviours"
    - "emergence of self organized amoeboid movement in a multi agent approximation of physarum polycephalum"
    - "physarum machine implementation of a kolmogorov uspensky machine on a biological substrate"

Connected through hyperedge HE-4 (induced by source paper "slime mould inspired generalised voronoi diagrams with repulsive fields"):
  with members:
    - "the emergence and dynamical evolution of complex transport networks from simple low level behaviours"
    - "emergence of self organized amoeboid movement in a multi agent approximation of physarum polycephalum"
    - "physarum boats if plasmodium sailed it would never leave a port"
    - "physarum machine implementation of a kolmogorov uspensky machine on a biological substrate"

Connected through hyperedge HE-5 (induced by source paper "material approximation of data smoothing and spline curves inspired by slime mould"):
  with members:
    - "slime mould inspired generalised voronoi diagrams with repulsive fields"
    - "the emergence and dynamical evolution of complex transport networks from simple low level behaviours"
    - "computation of the travelling salesman problem by a shrinking blob"

Connected through hyperedge HE-6 (induced by source paper "automated guidance of collective movement in a multi agent model of physarum polycephalum"):
  with members:
    - "a morphological adaptation approach to path planning inspired by slime mould"
    - "towards slime mould chemical sensor mapping chemical inputs onto electrical potential dynamics of physarum polycephalum"
    - "slime mould tactile sensor"

Connected through hyperedge HE-7 (induced by source paper "mechanisms inducing parallel computation in a model of physarum polycephalum transport networks"):
  with members:
    - "the emergence and dynamical evolution of complex transport networks from simple low level behaviours"
    - "emergence of self organized amoeboid movement in a multi agent approximation of physarum polycephalum"
    - "physarum machine implementation of a kolmogorov uspensky machine on a biological substrate"

Connected through hyperedge HE-8 (induced by source paper "emergence of self organized amoeboid movement in a multi agent approximation of physarum polycephalum"):
  with members:
    - "the emergence and dynamical evolution of complex transport networks from simple low level behaviours"
    - "multiagent control of self reconfigurable robots"

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.RO(Robotics)