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: "movie pirates of the caribbean exploring illegal streaming cyberlockers"
  Abstract: Online video piracy (OVP) is a contentious topic, with strong proponents on both sides of the argument. Recently, a number of illegal websites, called streaming cyberlockers, have begun to dominate OVP. These websites specialise in distributing pirated content, underpinned by third party indexing services offering easy-to-access directories of content. This paper performs the first exploration of this new ecosystem. It characterises the content, as well the streaming cyberlockers' individual attributes. We find a remarkably centralised system with just a few networks, countries and cyberlockers underpinning most provisioning. We also investigate the actions of copyright enforcers. We find they tend to target small subsets of the ecosystem, although they appear quite successful. 84% of copyright notices see content removed.

Connected through hyperedge HE-1 (induced by source paper "the chain of implicit trust an analysis of the web third party resources loading"):
  with members:
    - "who watches the watchmen exploring complaints on the web"
    - "tracing information flows between ad exchanges using retargeted ads"
    - "thou shalt not depend on me analysing the use of outdated javascript libraries on the web"
    - "anatomy of the third party web tracking ecosystem"

Connected through hyperedge HE-2 (induced by source paper "who watches the watchmen exploring complaints on the web"):
  with members:
    - "the chain of implicit trust an analysis of the web third party resources loading"
    - "facebook a live are live social broadcasts really broadcasts"
    - "a long way to the top significance structure and stability of internet top lists"
    - "a quantitative measure of fairness and discrimination for resource allocation in shared computer systems"

Connected through hyperedge HE-3 (induced by source paper "pythia a framework for the automated analysis of web hosting environments"):
  with members:
    - "structure and stability of internet top lists"
    - "open connect everywhere a glimpse at the internet ecosystem through the lens of the netflix cdn"

Connected through hyperedge HE-4 (induced by source paper "the price of free illegal live streaming services"):
  with members:
    - "measuring third party tracker power across web and mobile"
    - "variations in tracking in relation to geographic location"

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)