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: "unveiling the research landscape of sustainable development goals and their inclusion in higher education institutions and research centers major trends in 2000 2017"
  Abstract: Sustainable Development Goals are the blueprint to achieve a better and more sustainable future for society. Its legacy is linked with the Millennium Development Goals, set up in 2000. A bibliometric analysis was conducted to 1) measure "core" research output from 2000-2017, with the aim to map the global research of sustainability goals, 2) describe thematic specialization based on keywords co-occurrence analysis and strongest citation burst, 3) present a methodology to classify scientific output (based on an ad-hoc glossary) and assess SDGs interconnections.  Sustainability goals publications (core+expand based on direct citations) were identified in-house CWTS Web of Science by using search terms in titles, abstracts, and keywords. 25,299 bibliographic records were analyzed, from which 21,653 (85.59%) are from HEIs and research centres (RC). The purpose of this paper is to analyze the role of these organizations in sustainability research. The findings reveal the increasing participation of these organizations in this research (660 institutions in 2000-2005 to 1744 institutions involved in 2012-2017). In terms of specialization, some institutions present a higher production and specialization on the topic (e.g., London School of Hygiene & Tropical Medicine and World Health Organization); however, others present less production but higher specialization (e.g., Stockholm Environment Institute). Regarding the topics, health (especially in developing countries), women and socio-economic aspects are the most prominent ones. Moreover, it is observed the interlinked nature of SDGs between some SDGs in research output (e.g., SDG11 and SDG3). This study provides important orientation for HEIs and RCs in terms of Research, Development and Innovation (R&D+i) to respond to major societal challenges and could be useful for the policymakers in order to promote the research agenda on this topic.

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.DL(Digital Libraries)