extension relation counts:
 count |             name              |      base_cv_name       
-------+-------------------------------+-------------------------
   214 | happens_during                | biological_process
   318 | has_input                     | biological_process
   328 | has_regulation_target         | biological_process
    39 | occurs_at                     | biological_process
     6 | occurs_in                     | biological_process
    83 | part_of                       | biological_process
    20 | regulates_activity_of         | biological_process
   269 | coincident_with               | cellular_component
  1627 | exists_during                 | cellular_component
    17 | not_exists_during             | cellular_component
    18 | part_of                       | cellular_component
   477 | assayed_enzyme                | fission_yeast_phenotype
   204 | assayed_substrate             | fission_yeast_phenotype
 15630 | assayed_using                 | fission_yeast_phenotype
 11112 | has_expressivity              | fission_yeast_phenotype
 10084 | has_penetrance                | fission_yeast_phenotype
    49 | is_bearer_of                  | fission_yeast_phenotype
     4 | occurs_at                     | fission_yeast_phenotype
     5 | occurs_in                     | fission_yeast_phenotype
 37121 | during                        | gene_ex
     4 | in_absence_of                 | gene_ex
   649 | in_presence_of                | gene_ex
    29 | occurs_in                     | gene_ex
    59 | activated_by                  | molecular_function
    36 | directly_negatively_regulates | molecular_function
    28 | directly_positively_regulates | molecular_function
   438 | happens_during                | molecular_function
  2408 | has_direct_input              | molecular_function
   203 | has_regulation_target         | molecular_function
    64 | inhibited_by                  | molecular_function
     1 | not_happens_during            | molecular_function
   159 | occurs_at                     | molecular_function
    30 | occurs_in                     | molecular_function
   676 | part_of                       | molecular_function
    33 | absent_during                 | PSI-MOD
   700 | added_by                      | PSI-MOD
   241 | added_during                  | PSI-MOD
     8 | coincident_with               | PSI-MOD
     4 | has_direct_input              | PSI-MOD
     6 | in_presence_of                | PSI-MOD
   334 | level_fluctuates_during       | PSI-MOD
     4 | occupancy                     | PSI-MOD
  8273 | present_during                | PSI-MOD
    54 | removed_by                    | PSI-MOD
    47 | removed_during                | PSI-MOD
     6 | required_for                  | PSI-MOD
     2 | located_in                    | subunit_composition
(47 rows)


number of annotations using extensions by cv:
 count |      base_cv_name       
-------+-------------------------
     2 | subunit_composition
   890 | biological_process
  1812 | cellular_component
  3289 | molecular_function
  9078 | PSI-MOD
 33513 | fission_yeast_phenotype
 37733 | gene_ex
(7 rows)