human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "analysis of search stratagem utilisation"):
  Abstract: In interactive information retrieval, researchers consider the user behaviour towards systems and search tasks in order to adapt search results and to improve the search experience of users. Analysing the users’ past interactions with the system is one typical approach. In this paper, we analyse the user behaviour in retrieval sessions towards Marcia Bates’ search stratagems such as “Footnote Chasing”, “Citation Searching”, “Keyword Searching”, “Author Searching” and “Journal Run” in a real-life academic search engine. In fact, search stratagems represent high-level search behaviour as the users go beyond simple execution of queries and investigate more of the system functionalities. We performed analyses of these five search stratagems using two datasets extracted from the social sciences search engine sowiport. A specific focus was the detection of the search phase and frequency of the usage of these stratagems. In addition, we explored the impact of these stratagems on the whole search process performance. We addressed mainly the usage patterns’ observation of the stratagems, their impact on the conduct of retrieval sessions and explored whether they are used similarly in both datasets. From the observation and metrics proposed, we can conclude that the utilisation of search stratagems in real retrieval sessions leads to an improvement of the precision in terms of positive interactions. For both datasets (SUSS 14–15 and SUSS 16–17), the user behaviour was similar as all stratagems appear most frequently in the middle of a session. However, the difference is that “Footnote Chasing”, “Citation Searching” and “Journal Run” appear mostly at the end of a session while Keyword and Author Searching appear typically at the beginning. Thus, we can conclude from the log analysis that the improvement of search functionalities including personalisation and/or recommendation could be achieved by considering references, citations, and journals in the ranking process.

Includes members:
  Member "investigating exploratory search activities based on the stratagem level in digital libraries":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "reading protocol understanding what has been read in interactive information retrieval tasks")
  Member "contextualised browsing in a digital library s living lab":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "online evaluations for everyone mr dlib s living lab for scholarly recommendations")
  Member "analysis of footnote chasing and citation searching in an academic search engine":
    also connected through other hyperedges:
      (none)
  Member "a complete year of user retrieval sessions in a social sciences academic search engine":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "contextualised browsing in a digital library s living lab")
  Member "a usefulness based approach for measuring the local and global effect of iir services":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "a digital library for research data and related information in the social sciences")
  Member "extending search facilities via bibliometric enhanced stratagems":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "contextualised browsing in a digital library s living lab")
  Member "scientometrics and information retrieval weak links revitalized":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "report on the 8th international workshop on bibliometric enhanced information retrieval bir 2019")
  Member "science models as value added services for scholarly information systems":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "a usefulness based approach for measuring the local and global effect of iir services")

Question: Please tell me which class the source paper 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.IR(Information Retrieval)