<results>
  <input>
    <mapped>ID1</mapped>
    <mapped>ID2</mapped>
    ...
    <unmapped>ID1</unmapped>
    <unmapped>ID2</unmapped>
    ...
  </input>
  <result>
    <term>
      <id>GO:nnn</id>
      <label>fatty acid metabolic process</label>
    </term>
    <number_in_population>188</number_in_population>
    <number_in_sample>45</number_in_sample>
    <expected>3.98</expected>
    <plus_or_minus>+</plus_or_minus>
    <p_value>6.88</p_value>
  </result>
  ...
/<results>
