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: "the voting farm a distributed class for software voting"
  Abstract: This document describes a class of C functions implementing a distributed software voting mechanism for EPX or similar message passing multi-threaded environments. Such a tool may be used for example, to set up a restoring organ, i.e., an NMR (i.e., N-module redundant) system with N voters. In order to describe the tool we start defining its basic building block, the voter. A voter is defined as a software module connected to one user module and to a farm of fellow voters arranged into a clique. By means of the functions in the class the user module is able: to create a static "picture" of the voting farm, needed for the set up of the clique; to instantiate the local voter; to send input or control messages to that voter. No interlocutor is needed other than the local voter. The other user modules are supposed to create coherent pictures and instances of voters on other nodes of the machine and to manage consistently the task of their local intermediary. All technicalities concerning the set up of the clique and the exchange of messages between the voters are completely transparent to the user module. In the following the basic functionalities of the VotingFarm class will be discussed, namely how to set up a "passive farm", or a non-alive topological representation of a yet-to-be-activated voting farm; how to initiate the voting farm; how to control the farm.

Connected through hyperedge HE-1 (induced by source paper "a survey of linguistic structures for application level fault tolerance"):
  with members:
    - "an algorithm for tolerating crash failures in distributed systems"
    - "a fault tolerance linguistic structure for distributed applications"
    - "a system structure for adaptive mobile applications"
    - "the dir net a distributed system for detection isolation and recovery"
    - "the eftos voting farm a software tool for fault masking in message passing parallel environments"
    - "an application level dependable technique for farmer worker parallel programs"

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.DC(Distributed, Parallel, and Cluster Computing)