Entity reconciliation can be used to check if any entry in a data column makes mention of persons or companies of interest. More generally, the function enables another application - typically Open Refine - to link up (reconcile) values in it’s own data with the entities stored in this service.
To use the reconciliation function, first install the free Open Refine tool on your computer and create a new project from a spreadsheet with at least one column that contains the names of people or companies. In the header of that column, select the drop down menu, Reconcile, then Start reconciling.... The following window allows you to add a new standard reconciliation service. Paste the URL for Aleph and click Add Service. Then choose Start reconciling to begin the reconciliation process.
For further information, consult the following documents: