Find all workers which are missing emergency contact

Summary

How to create a report which present the employees that missing an emergency contact

Content

Hi,

Someone has an idea how to create a report in OTBI of all the employees that doesn't have an emergency contact  (none of their contact was marked as 'emergency contact') or employees which emergency contact but the contact without a phone number?

Since one employee can have several contacts I can't figure how to create a such report.

Thanks in advance