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: "livinglab pjait towards better urban participation of seniors"
  Abstract: In this paper we provide a brief summary of development LivingLab PJAIT as an attempt to establish a comprehensive and sustainable ICT-based solution for empowerment of elderly communities towards better urban participation of seniors. We report on our various endeavors for better involvement and participation of older adults in urban life by lowering ICT barriers, encouraging social inclusion, intergenerational interaction, physical activity and engaging older adults in the process of development of ICT solutions. We report on a model and assumptions of the LivingLab PJAIT as well as a number of activities created and implemented for LivingLab participants: from ICT courses, both traditional and e-learning, through on-line crowdsourcing tasks, to blended activities of different forms and complexity. We also provide conclusions on the lessons learned in the process and some future plans, including solutions for better senior urban participation and citizen science.

Connected through hyperedge HE-1 (induced by source paper "technologies for promoting social participation in later life"):
  with members:
    - "designing for co located and virtual social interactions in residential care"
    - "agile development for vulnerable populations lessons learned and recommendations"
    - "golden years golden shores a study of elders in online travel communities"
    - "turned 70 it is time to start editing wikipedia"
    - "a location based game for two generations teaching mobile technology to the elderly with the support of young volunteers"
    - "senior programmers characteristics of elderly users from stack overflow"
    - "online group exercises for older adults of different physical abilities"

Connected through hyperedge HE-2 (induced by source paper "vr with older adults participatory design of a virtual atm training simulation"):
  with members:
    - "older adults and voice interaction a pilot study with google home"
    - "older adults and crowdsourcing android tv app for evaluating tedx subtitle quality"
    - "guidelines towards better participation of older adults in software development processes using a new spiral method and participatory approach"
    - "press f1 for help participatory design for dealing with on line and real life security of older adults"
    - "a location based game for two generations teaching mobile technology to the elderly with the support of young volunteers"
    - "beyond participatory design towards a model for teaching seniors application design"

Connected through hyperedge HE-3 (induced by source paper "older adults and voice interaction a pilot study with google home"):
  with members:
    - "older adults and crowdsourcing android tv app for evaluating tedx subtitle quality"
    - "guidelines towards better participation of older adults in software development processes using a new spiral method and participatory approach"

Connected through hyperedge HE-4 (induced by source paper "a comparative study of younger and older adults interaction with a crowdsourcing android tv app for detecting errors in tedx video subtitles"):
  with members:
    - "older adults and crowdsourcing android tv app for evaluating tedx subtitle quality"

Connected through hyperedge HE-5 (induced by source paper "older adults and crowdsourcing android tv app for evaluating tedx subtitle quality"):
  with members:
    - "guidelines towards better participation of older adults in software development processes using a new spiral method and participatory approach"
    - "from close the door to do not click and back security by design for older adults"
    - "press f1 for help participatory design for dealing with on line and real life security of older adults"
    - "turned 70 it is time to start editing wikipedia"
    - "a location based game for two generations teaching mobile technology to the elderly with the support of young volunteers"
    - "beyond participatory design towards a model for teaching seniors application design"
    - "emotions make cities live towards mapping emotions of older adults on urban space"

Connected through hyperedge HE-6 (induced by source paper "guidelines towards better participation of older adults in software development processes using a new spiral method and participatory approach"):
  with members:
    - "turned 70 it is time to start editing wikipedia"
    - "a location based game for two generations teaching mobile technology to the elderly with the support of young volunteers"
    - "beyond participatory design towards a model for teaching seniors application design"
    - "emotions make cities live towards mapping emotions of older adults on urban space"

Connected through hyperedge HE-7 (induced by source paper "from close the door to do not click and back security by design for older adults"):
  with members:
    - "press f1 for help participatory design for dealing with on line and real life security of older adults"
    - "turned 70 it is time to start editing wikipedia"
    - "a location based game for two generations teaching mobile technology to the elderly with the support of young volunteers"
    - "emotions make cities live towards mapping emotions of older adults on urban space"

Connected through hyperedge HE-8 (induced by source paper "golden years golden shores a study of elders in online travel communities"):
  with members:
    - "press f1 for help participatory design for dealing with on line and real life security of older adults"
    - "turned 70 it is time to start editing wikipedia"
    - "a location based game for two generations teaching mobile technology to the elderly with the support of young volunteers"
    - "senior programmers characteristics of elderly users from stack overflow"

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.CY(Computers and Society)