Just like matters and the occurrences can be grouped according to the type (for example,
Just like matters and the occurrences can be grouped according to the type (for example, composer/opera/country and mention/article/commentary, respectively), so much too of associations of can between the matters are grouped according to their type. The type of association for the reports/ratios mentioned above are written_by, takes_place_in, born_in, is_in (or retained geographical), and influenced_by.