4. The method of claim 1 further comprising displaying data to indicate a basis for a relationship type indicia, wherein the data is selected from a group consisting of: a data source for the first relationship type, at least two data sources for the second relationship type, unstructured text that includes the data item extracted from the first structured data source for the third relationship type, and a title of the second unstructured data source for the fourth relationship type.
4. The method of claim 1 further comprising displaying data to indicate a basis for a relationship type indicia, wherein the data is selected from a group consisting of: a data source for the first relationship type, at least two data sources for the second relationship type, unstructured text that includes the data item extracted from the first structured data source for the third relationship type, and a title of the second unstructured data source for the fourth relationship type. 5. The method of claim 4 wherein the data is displayed only if a user selects a show link evidence option displayed on the user interface.