I would like to choose which relationship within an organization to send a letter to, within the batch. For example, I have an organization I'm entering a gift record to as part of a batch. The organization is large and has 10 or more relationship records. I don't want to send the letter to the primary relationship constituency in this case, instead, I want to choose the sponsorship contact constituency. That way, when I run the batch through the conditional mail merge using Word, most letters will go to the primary contact, but the sponsorship letter will use the sponsorship contact for that organization.