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<result>
    <checked_in></checked_in>
...
    <change_request>AQX123</change_request>
    <po_number>42</po_number>
</result>

<result>
    <po_number>42</po_number>
    <checked_in>1 week ago</checked_in>
    <change_request>AQX120</change_request>
</result>

<result>
    <checked_in></checked_in>
...
    <bogon>AQX123</bogon>
    <bogon>42</bogon>
</result>