extension relation counts:
 count |             name              |      base_cv_name       
-------+-------------------------------+-------------------------
   194 | happens_during                | biological_process
   299 | has_input                     | biological_process
   293 | has_regulation_target         | biological_process
     1 | not_happens_during            | biological_process
    27 | occurs_at                     | biological_process
    12 | occurs_in                     | biological_process
   174 | coincident_with               | cellular_component
  1263 | exists_during                 | cellular_component
    16 | not_exists_during             | cellular_component
     8 | part_of                       | cellular_component
   251 | assayed_enzyme                | fission_yeast_phenotype
   147 | assayed_substrate             | fission_yeast_phenotype
 11183 | assayed_using                 | fission_yeast_phenotype
  7352 | has_expressivity              | fission_yeast_phenotype
  7277 | has_penetrance                | fission_yeast_phenotype
    45 | is_bearer_of                  | fission_yeast_phenotype
     5 | occurs_in                     | fission_yeast_phenotype
 36340 | during                        | gene_ex
     4 | in_absence_of                 | gene_ex
   644 | in_presence_of                | gene_ex
    29 | occurs_in                     | gene_ex
    65 | activated_by                  | molecular_function
     5 | directly_negatively_regulates | molecular_function
     6 | directly_positively_regulates | molecular_function
   188 | happens_during                | molecular_function
  2090 | has_direct_input              | molecular_function
   168 | has_regulation_target         | molecular_function
    67 | inhibited_by                  | molecular_function
     3 | not_happens_during            | molecular_function
   109 | occurs_at                     | molecular_function
    13 | occurs_in                     | molecular_function
   149 | part_of                       | molecular_function
    29 | absent_during                 | PSI-MOD
   282 | added_by                      | PSI-MOD
   202 | 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
     1 | occupancy                     | PSI-MOD
  6806 | present_during                | PSI-MOD
    32 | removed_by                    | PSI-MOD
    42 | removed_during                | PSI-MOD
     4 | required_for                  | PSI-MOD
     2 | located_in                    | subunit_composition
(45 rows)


number of annotations using extensions by cv:
 count |      base_cv_name       
-------+-------------------------
     2 | subunit_composition
   736 | biological_process
  1396 | cellular_component
  2605 | molecular_function
  7634 | PSI-MOD
 23495 | fission_yeast_phenotype
 36956 | gene_ex
(7 rows)