You will need the EntityRelationshipImportTemplate.xls file to import relationships between entities and entity collection.
To import relationships:
In the RiskVision application, use one of the following navigation:
Go to Entities > Entities and select an entity to open its details page.
Go to Entities > Entity Collections and select an entity collection to open its details page.
Click the Relationships tab, then click Import Relationship.
Click Browse, select the EntityRelationshipImportTemplate.xlsfile, click Open, and then click OK.