<record>
  <controlfield tag="001">1866</controlfield>
  <datafield tag="653" ind1="1" ind2=" ">
    <subfield code="a">Machine learning</subfield>
  </datafield>
  <datafield tag="653" ind1="1" ind2=" ">
    <subfield code="a">Boosted decision trees</subfield>
  </datafield>
  <datafield tag="653" ind1="1" ind2=" ">
    <subfield code="a">ECL</subfield>
  </datafield>
  <datafield tag="653" ind1="1" ind2=" ">
    <subfield code="a">Particle identification</subfield>
  </datafield>
</record>