extension relation counts:
 count |          name           |      base_cv_name       
-------+-------------------------+-------------------------
     8 | dependent_on            | biological_process
   174 | happens_during          | biological_process
   287 | has_input               | biological_process
   272 | has_regulation_target   | biological_process
    12 | independent_of          | biological_process
     2 | in_presence_of          | biological_process
     1 | not_happens_during      | biological_process
    25 | occurs_at               | biological_process
    13 | occurs_in               | biological_process
    41 | coincident_with         | cellular_component
    29 | dependent_on            | cellular_component
   890 | exists_during           | cellular_component
    20 | independent_of          | cellular_component
    16 | not_exists_during       | cellular_component
     4 | part_of                 | cellular_component
    23 | assayed_enzyme          | fission_yeast_phenotype
     9 | assayed_substrate       | fission_yeast_phenotype
  7154 | assayed_using           | fission_yeast_phenotype
  4795 | has_expressivity        | fission_yeast_phenotype
  6358 | has_penetrance          | fission_yeast_phenotype
    25 | is_bearer_of            | fission_yeast_phenotype
    24 | occurs_in               | fission_yeast_phenotype
 36097 | during                  | gene_ex
     4 | in_absence_of           | gene_ex
   641 | in_presence_of          | gene_ex
    29 | occurs_in               | gene_ex
    64 | activated_by            | molecular_function
     8 | dependent_on            | molecular_function
   150 | happens_during          | molecular_function
   407 | has_direct_input        | molecular_function
   178 | has_regulation_target   | molecular_function
    23 | independent_of          | molecular_function
    62 | inhibited_by            | molecular_function
     9 | in_presence_of          | molecular_function
     3 | not_happens_during      | molecular_function
   128 | occurs_at               | molecular_function
     9 | occurs_in               | molecular_function
    12 | part_of                 | molecular_function
    11 | absent_during           | PSI-MOD
   153 | added_by                | PSI-MOD
   108 | added_during            | PSI-MOD
     8 | coincident_with         | PSI-MOD
     4 | has_direct_input        | PSI-MOD
     2 | in_presence_of          | PSI-MOD
   334 | level_fluctuates_during | PSI-MOD
  6781 | present_during          | PSI-MOD
    20 | removed_by              | PSI-MOD
    19 | removed_during          | PSI-MOD
     1 | required_for            | PSI-MOD
(49 rows)


number of annotations using extensions by cv:
 count |      base_cv_name       
-------+-------------------------
   714 | biological_process
   878 | molecular_function
   950 | cellular_component
  7370 | PSI-MOD
 16534 | fission_yeast_phenotype
 36715 | gene_ex
(6 rows)