(from my custom_filters.xml)
People filter
<filter name="People @ Place" function="and">
<rule class="MatchesEventFilter" use_regex="False">
<arg value="@myPlace"/>
</rule>
</filter>
Event Filter
<filter name="@myPlace" function="and">
<rule class="MatchesPlaceFilter" use_regex="False">
<arg value="myPlace"/>
</rule>
</filter>
Place Filter
<filter name="myPlace" function="or">
<rule class="IsEnclosedBy" use_regex="False">
<arg value="P0255"/>
<arg value="1"/>
</rule>
</filter>