```xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns4:query_definition xmlns:ns2="http://www.i2b2.org/xsd/cell/crc/psm/1.1/" xmlns:ns4="http://www.i2b2.org/xsd/cell/crc/psm/querydefinition/1.1/" xmlns:ns3="http://www.i2b2.org/xsd/cell/crc/psm/analysisdefinition/1.1/">
    <query_name>Diabetes mellit@19:45:50</query_name>
    <query_timing>ANY</query_timing>
    <specificity_scale>0</specificity_scale>
    <panel>
        <panel_number>1</panel_number>
        <panel_timing>ANY</panel_timing>
        <panel_accuracy_scale>100</panel_accuracy_scale>
        <invert>0</invert>
        <total_item_occurrences>1</total_item_occurrences>
        <item>
            <hlevel>0</hlevel>
            <item_name>(PrevQuery)Diabetes mellit@15:51:49</item_name>
            <item_key>masterid:1529</item_key>
            <tooltip>Diabetes mellit@15:51:49</tooltip>
            <item_is_synonym>false</item_is_synonym>
        </item>
        <item>
            <hlevel>0</hlevel>
            <item_name>(PrevQuery)Diabetes mellit@15:51:49</item_name>
            <item_key>masterid:1529</item_key>
            <tooltip>Diabetes mellit@15:51:49</tooltip>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find patients with a diagnosis of diabetes mellitus within the specified time frame of 19 hours and 45 minutes. The query should include patients who have been diagnosed with diabetes at any time and have a high level of accuracy (1000%) in the results. This query consists of two items: the first item is a synonym for diabetes mellitus from a previous query, and the second item is also a synonym for diabetes mellitus from the same previous query. Both items are set at the same hierarchical level (hlevel) and are not considered synonyms. The query timing is set to ANY, indicating that the search is not limited to a specific time period.