During data import, there is some object export that is related to another object. The object relationship is only referenced using ID, hence, it’s impossible to identify the object type that it’s related to.
From the following attachment data export, we have the id – PARENTID. However, which object does this PARENTID belong to?
In order to retrieve the object name for the given ID, you have to manually include the PARENT.TYPE parameter into your query to retrieve the data export, resulting:
From the above, we can tell easily tell that the attachment record is associated with the contact.