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: "a location based game for two generations teaching mobile technology to the elderly with the support of young volunteers"
  Abstract: This paper presents a cooperative location-based game for the elderly with the use of tablets equipped with mobile application. The game was designed to tackle at once several crucial topics related to the issue of aging, namely the social inclusion, education in the field of modern technology, motivation for learning as well as physical activity. Mixed-aged teams consisting of two players: a junior and a senior took part in the game. The preliminary results suggest that the game can successfully address a number of issues including improving the elderly technical skills, increasing the elderly physical activity as well as positive intergenerational interaction. The paper describes the game setup in details and presents some initial data gathered during the gameplay.

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"
    - "livinglab pjait towards better urban participation of seniors"
    - "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"
    - "beyond participatory design towards a model for teaching seniors application design"
    - "livinglab pjait towards better urban participation of seniors"

Connected through hyperedge HE-3 (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"
    - "beyond participatory design towards a model for teaching seniors application design"
    - "livinglab pjait towards better urban participation of seniors"
    - "emotions make cities live towards mapping emotions of older adults on urban space"

Connected through hyperedge HE-4 (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"
    - "beyond participatory design towards a model for teaching seniors application design"
    - "livinglab pjait towards better urban participation of seniors"
    - "emotions make cities live towards mapping emotions of older adults on urban space"

Connected through hyperedge HE-5 (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"
    - "livinglab pjait towards better urban participation of seniors"
    - "emotions make cities live towards mapping emotions of older adults on urban space"

Connected through hyperedge HE-6 (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"
    - "livinglab pjait towards better urban participation of seniors"
    - "senior programmers characteristics of elderly users from stack overflow"

Connected through hyperedge HE-7 (induced by source paper "emotions make cities live towards mapping emotions of older adults on urban space"):
  with members:
    - "measuring urban deprivation from user generated content"
    - "the shortest path to happiness recommending beautiful quiet and happy routes in the city"
    - "rule based emotion detection on social media putting tweets on plutchik s wheel"
    - "crowdsourcing a word emotion association lexicon"

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.HC(Human-Computer Interaction)