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<?xml version="1.0"?>
<api>
  <query>
    <allcategories>
      <c size="1" pages="1" files="0" subcats="0" xml:space="preserve">1976 births</c>
      <c size="1" pages="1" files="0" subcats="0" xml:space="preserve">Aggregate information</c>
      <c size="1" pages="1" files="0" subcats="0" xml:space="preserve">Bonus shares reward</c>
      <c size="5" pages="5" files="0" subcats="0" xml:space="preserve">Business topics</c>
      <c size="2" pages="2" files="0" subcats="0" xml:space="preserve">Complete information</c>
      <c size="9" pages="9" files="0" subcats="0" xml:space="preserve">Continuous Double Auction (CDA)</c>
      <c size="2" pages="2" files="0" subcats="0" xml:space="preserve">Contribution incentive</c>
      <c size="3" pages="3" files="0" subcats="0" xml:space="preserve">Corporate</c>
      <c size="4" pages="4" files="0" subcats="0" xml:space="preserve">Current or recreation events</c>
      <c size="3" pages="3" files="0" subcats="0" xml:space="preserve">Elicit opinion</c>
    </allcategories>
  </query>
  <query-continue>
    <allcategories acfrom="Field experiment" />
  </query-continue>
</api>