<record>
  <controlfield tag="001">250</controlfield>
  <datafield tag="653" ind1="1" ind2=" ">
    <subfield code="a">access control</subfield>
  </datafield>
  <datafield tag="653" ind1="1" ind2=" ">
    <subfield code="a">machine learning</subfield>
  </datafield>
  <datafield tag="653" ind1="1" ind2=" ">
    <subfield code="a">prediction</subfield>
  </datafield>
</record>