extension relation counts:
 count |             name              |      base_cv_name       
-------+-------------------------------+-------------------------
   204 | happens_during                | biological_process
   329 | has_input                     | biological_process
   257 | has_regulation_target         | biological_process
    40 | occurs_at                     | biological_process
     7 | occurs_in                     | biological_process
    97 | part_of                       | biological_process
   318 | coincident_with               | cellular_component
  1719 | exists_during                 | cellular_component
    17 | not_exists_during             | cellular_component
    22 | part_of                       | cellular_component
   520 | assayed_enzyme                | fission_yeast_phenotype
   229 | assayed_substrate             | fission_yeast_phenotype
 17911 | assayed_using                 | fission_yeast_phenotype
 10588 | has_penetrance                | fission_yeast_phenotype
 12494 | has_severity                  | fission_yeast_phenotype
    49 | is_bearer_of                  | fission_yeast_phenotype
     4 | occurs_at                     | fission_yeast_phenotype
 37234 | during                        | gene_ex
     4 | in_absence_of                 | gene_ex
   651 | in_presence_of                | gene_ex
    29 | occurs_in                     | gene_ex
     4 | activated_by                  | molecular_function
    39 | directly_negatively_regulates | molecular_function
    29 | directly_positively_regulates | molecular_function
   408 | happens_during                | molecular_function
  2476 | has_direct_input              | molecular_function
    13 | has_input                     | molecular_function
   237 | has_regulation_target         | molecular_function
     1 | not_happens_during            | molecular_function
   133 | occurs_at                     | molecular_function
    43 | occurs_in                     | molecular_function
   732 | part_of                       | molecular_function
    33 | absent_during                 | PSI-MOD
   738 | added_by                      | PSI-MOD
   276 | added_during                  | PSI-MOD
   568 | affected_by                   | PSI-MOD
    15 | coincident_with               | PSI-MOD
     4 | has_direct_input              | PSI-MOD
     6 | in_presence_of                | PSI-MOD
   338 | level_fluctuates_during       | PSI-MOD
     7 | occupancy                     | PSI-MOD
  8281 | present_during                | PSI-MOD
    62 | removed_by                    | PSI-MOD
    46 | removed_during                | PSI-MOD
    12 | required_for                  | PSI-MOD
     2 | located_in                    | subunit_composition
(46 rows)


number of annotations using extensions by cv:
 count |      base_cv_name       
-------+-------------------------
     2 | subunit_composition
   820 | biological_process
  1956 | cellular_component
  3300 | molecular_function
  9725 | PSI-MOD
 37134 | fission_yeast_phenotype
 37849 | gene_ex
(7 rows)