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        <article-title>Combining Machine Learning and Knowledge Engineering in Practice (AAAI-MAKE 2020) - Volume I: Spring Symposium</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <string-name>Andreas Martin</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Knut Hinkelmann</string-name>
          <email>knut.hinkelmanng@fhnw.ch</email>
          <xref ref-type="aff" rid="aff0">0</xref>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <aff id="aff0">
          <label>0</label>
          <institution>Copyright c 2020 held by the author(s). In A. Martin, K. Hinkelmann</institution>
          ,
          <addr-line>H.-G. Fill, A. Gerber, D. Lenat, R. Stolle, F. van Harmelen (Eds.)</addr-line>
          ,
          <institution>Proceedings of the AAAI 2020 Spring Symposium on Combining Machine Learning and Knowledge Engineering in Practice (AAAI-MAKE 2020). Stanford University</institution>
          ,
          <addr-line>Palo Alto, California</addr-line>
          ,
          <country country="US">USA</country>
        </aff>
        <aff id="aff1">
          <label>1</label>
          <institution>FHNW University of Applied Sciences and Arts Northwestern Switzerland, School of Business</institution>
          ,
          <addr-line>Olten</addr-line>
          ,
          <country country="CH">Switzerland</country>
        </aff>
      </contrib-group>
      <pub-date>
        <year>2020</year>
      </pub-date>
      <abstract>
        <p>Volume I, which contains a comprehensive collection of different papers from industry and academia with a focus on practical applications on the combination of machine learning and knowledge engineering. The papers of Volume I, the AAAI 2020 Spring Symposium, are presented together with the updated/revised papers of Volume II at the AAAI 2020 Fall Symposium.</p>
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      <p>Preface
The AAAI 2020 spring symposium on combining machine
learning and knowledge engineering in practice
(AAAIMAKE 2020), which was planned to be held at Stanford
University, Palo Alto, California, USA, from March 23 to
25, 2020, has the aim of bringing together practitioners and
researchers from various companies, research centers, and
academia coming from machine learning and knowledge
engineering domains. Despite a voluminous submission phase,
and a rigorous and in-depth review by the program
committee, the AAAI had to cancel the physical meeting of
the Spring Symposium, including this AAAI-MAKE 2020
symposium, due to the spread of Sars-CoV-2, the resulting
disease COVID-19. Therefore, AAAI-MAKE 2020 is
postponed and part of the AAAI Fall Symposium in Arlington,
Virginia, adjacent to Washington, DC, on November 11-12,
2020.</p>
      <p>However, it was clear to the authors, participants,
organizers, and chairs that, despite the deferring of the physical
meeting, everyone will continue to work on a joint AI that
is being explainable and grounded in domain knowledge. In
consultation with the authors, organizers, program
committee, and chairs, the papers shall be published as Volume I,
despite the physical meeting had to be postponed. In Volume
II, authors have the opportunity to submit an updated/revised
version of their papers for the Fall Symposium, subject to
a rigorous and in-depth editorial review, as this joint AI
research should not and cannot just be suspended due to a
pandemic situation.</p>
      <p>We are grateful to CEUR-WS.org for relaxing the
requirement of a physical location and allowing us to publish this</p>
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