[{objects:[{"_id":ObjectId("6257047cffd61ab62864c1ae"),"objectType":"organization","relation":"Exposed_to"},{"_id":ObjectId("6257047cffd61ab62864c1ad"),"objectType":"group","relation":"Exposed_to"},]},{objects:[{"_id":ObjectId("6257047cffd61ab62864c1ae"),"objectType":"organization","relation":"Exposed_to"},{"_id":ObjectId("6257047cffd61ab62864c1ad"),"objectType":"no-group","relation":"Exposed_to"},]},{objects:[{"_id":ObjectId("6257047cffd61ab62864c1ce"),"objectType":"person","relation":"Exposed_to"},{"_id":ObjectId("6257047cffd61ab62864c1cb"),"objectType":"group","relation":"Exposed_to"},]},]

db.collection.find({$and:[{"objects.objectType":"group"},{objects:{$not:{"$elemMatch":{"objectType":"person","relation":"Exposed_to"}}}}]})