```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>Exter-Assau-Assau@23:47:38</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)External causes@23:38:14</item_name>
            <item_key>masterid:28350</item_key>
            <tooltip>External causes@23:38:14</tooltip>
            <item_is_synonym>false</item_is_synonym>
        </item>
        <item>
            <hlevel>0</hlevel>
            <item_name>Patient Set for "External causes@23:38:14"Patient setFINISHED</item_name>
            <item_key>patient_set_coll_id:61856</item_key>
            <tooltip>Patient Set for "External causes@23:38:14"Patient setFINISHED</tooltip>
            <item_is_synonym>false</item_is_synonym>
        </item>
        <item>
            <hlevel>0</hlevel>
            <item_name>Patient Set for "External causes@23:38:14"Patient setFINISHED</item_name>
            <item_key>patient_set_coll_id:61856</item_key>
            <tooltip>Patient Set for "External causes@23:38:14"Patient setFINISHED</tooltip>
            <item_is_synonym>false</item_is_synonym>
        </item>
        <item>
            <hlevel>0</hlevel>
            <item_name>Encounter Set for "External causes@23:37:39"Encounter setFINISHED</item_name>
            <item_key>patient_set_enc_id:61854</item_key>
            <tooltip>Encounter Set for "External causes@23:37:39"Encounter setFINISHED</tooltip>
            <item_is_synonym>false</item_is_synonym>
        </item>
        <item>
            <hlevel>0</hlevel>
            <item_name>(PrevQuery)Assault (x92-y0@22:40:45</item_name>
            <item_key>masterid:28339</item_key>
            <tooltip>Assault (x92-y0@22:40:45</tooltip>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
    <panel>
        <panel_number>2</panel_number>
        <panel_timing>ANY</panel_timing>
        <panel_accuracy_scale>100</panel_accuracy_scale>
        <invert>1</invert>
        <total_item_occurrences>1</total_item_occurrences>
        <item>
            <hlevel>0</hlevel>
            <item_name>(PrevQuery)Assault (x92-y0@22:40:45</item_name>
            <item_key>masterid:28339</item_key>
            <tooltip>Assault (x92-y0@22:40:45</tooltip>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
    <panel>
        <panel_number>3</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)Assault by blun@22:39:01</item_name>
            <item_key>masterid:28338</item_key>
            <tooltip>Assault by blun@22:39:01</tooltip>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find patients who have been diagnosed with external causes (specifically assault) within a certain time frame, and exclude those who have been diagnosed with assault by blunt objects. The query is split into three panels: the first panel includes patients with a diagnosis of "External causes@23:38:14" and "Patient Set for "External causes@23:38:14"Patient setFINISHED", the second panel excludes patients with a diagnosis of "Assault (x92-y0@2:40:45", and the third panel includes patients with a diagnosis of "Assault by blunt@2:39:01". The specificity scale is set to 0, and the query timing is set to ANY.