NII Testbeds and Community for Information Access Research 14th Inte

This book constitutes the refereed proceedings of the 14th International Conference on NII Testbeds and Community for Information Access Research, NTCIR 2019, held in Tokyo, Japan, in June 2019. The 15 full papers presented in this book were car

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Makoto P. Kato · Yiqun Liu · Noriko Kando · Charles L. A. Clarke (Eds.)

NII Testbeds and Community for Information Access Research 14th International Conference, NTCIR 2019 Tokyo, Japan, June 10–13, 2019 Revised Selected Papers

Lecture Notes in Computer Science Founding Editors Gerhard Goos Karlsruhe Institute of Technology, Karlsruhe, Germany Juris Hartmanis Cornell University, Ithaca, NY, USA

Editorial Board Members Elisa Bertino Purdue University, West Lafayette, IN, USA Wen Gao Peking University, Beijing, China Bernhard Steffen TU Dortmund University, Dortmund, Germany Gerhard Woeginger RWTH Aachen, Aachen, Germany Moti Yung Columbia University, New York, NY, USA

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More information about this series at http://www.springer.com/series/7409

Makoto P. Kato Yiqun Liu Noriko Kando Charles L. A. Clarke (Eds.) •





NII Testbeds and Community for Information Access Research 14th International Conference, NTCIR 2019 Tokyo, Japan, June 10–13, 2019 Revised Selected Papers

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Editors Makoto P. Kato University of Tsukuba Tsukuba, Japan

Yiqun Liu Tsinghua University Beijing, China

Noriko Kando National Institute of Informatics (NII) Tokyo, Japan

Charles L. A. Clarke University of Waterloo Waterloo, ON, Canada

ISSN 0302-9743 ISSN 1611-3349 (electronic) Lecture Notes in Computer Science ISBN 978-3-030-36804-3 ISBN 978-3-030-36805-0 (eBook) https://doi.org/10.1007/978-3-030-36805-0 LNCS Sublibrary: SL3 – Information Systems and Applications, incl. Internet/Web, and HCI © Springer Nature Switzerland AG 2019 This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, expressed or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. This Springer imprint is published by the registered company Springer Nature Switzerland AG The registered company address is: Gewerbestrasse 11, 6330 Cham, Switzerland

Preface

The 14th NTCIR Conference on Evaluation of Information Access Technologies was held during June 10–13, 2019, in Tokyo, Japa