extension relation counts:
 count |          name           |      base_cv_name       
-------+-------------------------+-------------------------
   191 | happens_during          | biological_process
   297 | has_input               | biological_process
   298 | has_regulation_target   | biological_process
     1 | not_happens_during      | biological_process
    27 | occurs_at               | biological_process
    12 | occurs_in               | biological_process
   166 | coincident_with         | cellular_component
  1156 | exists_during           | cellular_component
    16 | not_exists_during       | cellular_component
     8 | part_of                 | cellular_component
   215 | assayed_enzyme          | fission_yeast_phenotype
   127 | assayed_substrate       | fission_yeast_phenotype
 10206 | assayed_using           | fission_yeast_phenotype
  6752 | has_expressivity        | fission_yeast_phenotype
  6922 | has_penetrance          | fission_yeast_phenotype
    45 | is_bearer_of            | fission_yeast_phenotype
     5 | occurs_in               | fission_yeast_phenotype
 36315 | during                  | gene_ex
     4 | in_absence_of           | gene_ex
   644 | in_presence_of          | gene_ex
    29 | occurs_in               | gene_ex
    67 | activated_by            | molecular_function
   169 | happens_during          | molecular_function
  2056 | has_direct_input        | molecular_function
   166 | has_regulation_target   | molecular_function
    67 | inhibited_by            | molecular_function
     3 | not_happens_during      | molecular_function
   106 | occurs_at               | molecular_function
    13 | occurs_in               | molecular_function
    82 | part_of                 | molecular_function
    28 | absent_during           | PSI-MOD
   222 | added_by                | PSI-MOD
   190 | 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
  6799 | present_during          | PSI-MOD
    26 | removed_by              | PSI-MOD
    41 | removed_during          | PSI-MOD
     2 | required_for            | PSI-MOD
     2 | located_in              | subunit_composition
(43 rows)


number of annotations using extensions by cv:
 count |      base_cv_name       
-------+-------------------------
     2 | subunit_composition
   735 | biological_process
  1275 | cellular_component
  2529 | molecular_function
  7567 | PSI-MOD
 21816 | fission_yeast_phenotype
 36931 | gene_ex
(7 rows)