Search for a pod that has a spedicif value in a relationship field

Search for a pod that has a spedicif value in a relationship field.

I have extended the “post” pod, just added a relationship field to another pod (Custom Post Type) called “Cities”

I have another pod with a lot of fields etc: let’s call it “Events”.
The “Events” pod also has a relationship field to “Cities”.

Now, in a specific event page, I wanto to show all posts that are related do the same city of that event.

I was thinking of doing something like this:

$id_city=get_the_id();
$params = array(
    'orderby' => 't.name DESC',
    'limit' => 15,
    'where' => '??????'
    );
$posts_pod = pods( 'post', $params );

as you can see, i don’t know what to put in the “where” clause…

https://www.ads-software.com/plugins/pods/