Formula Error

[ This is for Conga - trying to say I want the email to be sent to all 3 of these recipients ]

&EmailToId={!AND(Event_Educator__c.EducatorId__c,Event_Educator__c.Sales_Manager_ID__c,Event_Educator__c.Revlon_Contact_ID__c)}

Syntax error = "Error: Incorrect parameter type for function 'AND()'. Expected Boolean, received Lookup()"