Add the "Array of Collections" trigger.
Add the "Extract Item" action.
In the "Array" field, select the "Array of Collections" trigger.
In the "Item" field, select the "Email" field.
In the "Index" field, select "0" to extract the first item in the array.
Save and run the scenario.
This scenario can be used to extract an email from an array of collections, for example to send a welcome email to new subscribers.