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: "double head rcnn rethinking classification and localization for object detection"
  Abstract: Modern R-CNN based detectors apply a head to extract Region of Interest (RoI) features for both classification and localization tasks. In contrast, we found that these two tasks have opposite preferences towards two widely used head structures (i.e. fully connected head and convolution head). Specifically, the fully connected head is more suitable for the classification task, while the convolution head is more suitable for the localization task. Therefore, we propose a Double-Head method, which has a fully connected head focusing on classification and a convolution head to pay more attention to bounding box regression. In addition, we have two findings for the unfocused tasks (i.e. classification in the convolution head, and bounding box regression in the fully connected head): (a) adding classification to the convolution head is complementary to the classification in the fully connected head, and (b) bounding box regression provides auxiliary supervision for the fully connected head. Without bells and whistles, our method gains +3.5 and +2.8 AP on MS COCO dataset from Feature Pyramid Network (FPN) baselines with ResNet-50 and ResNet-101 backbones, respectively.

Connected through hyperedge HE-1 (induced by source paper "revisiting the sibling head in object detector"):
  with members:
    - "reppoints point set representation for object detection"
    - "gcnet non local networks meet squeeze excitation networks and beyond"
    - "centernet keypoint triplets for object detection"
    - "fcos fully convolutional one stage object detection"
    - "scale aware trident networks for object detection"
    - "bottom up object detection by grouping extreme and center points"
    - "cornernet detecting objects as paired keypoints"
    - "dropblock a regularization method for convolutional networks"

Connected through hyperedge HE-2 (induced by source paper "pbrnet pyramidal bounding box refinement to improve object localization accuracy"):
  with members:
    - "libra r cnn towards balanced learning for object detection"
    - "side aware boundary localization for more precise object detection"
    - "mmdetection open mmlab detection toolbox and benchmark"
    - "revisiting rcnn on awakening the classification power of faster rcnn"
    - "path aggregation network for instance segmentation"
    - "focal loss for dense object detection"
    - "attention is all you need"
    - "relation networks for object detection"

Connected through hyperedge HE-3 (induced by source paper "1st place solutions for openimage2019 object detection and instance segmentation"):
  with members:
    - "revisiting the sibling head in object detector"
    - "detecting 11k classes large scale object detection without fine grained bounding boxes"
    - "mmdetection open mmlab detection toolbox and benchmark"
    - "cornernet detecting objects as paired keypoints"
    - "gradient harmonized single stage detector"
    - "pfdet 2nd place solution to open images challenge 2018 object detection track"
    - "acquisition of localization confidence for accurate object detection"
    - "the open images dataset v4 unified image classification object detection and visual relationship detection at scale"

Connected through hyperedge HE-4 (induced by source paper "mmdetection open mmlab detection toolbox and benchmark"):
  with members:
    - "libra r cnn towards balanced learning for object detection"
    - "gcnet non local networks meet squeeze excitation networks and beyond"
    - "generalized intersection over union a metric and a loss for bounding box regression"
    - "region proposal by guided anchoring"
    - "an empirical study of spatial attention mechanisms in deep networks"
    - "simpledet a simple and versatile distributed framework for object detection and instance recognition"
    - "feature selective anchor free module for single shot object detection"
    - "mask scoring r cnn"

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.CV(Computer Vision and Pattern Recognition)