Table: min_age_conv
Columns: ilo_code
field
conclusion_date
entry_into_force
closure_for_signature
parties_april_2011
denunciations_september_2011
revising_convention_s
text_and_ratifications

Question: What were the revising conventions commentary with a denunciation of 21?
SQL: SELECT "revising_convention_s" FROM min_age_conv WHERE "denunciations_september_2011" = 21

Question: How many inputs are there in the 'closure for signature' tab under the field 'sea (revised)'?
SQL: SELECT COUNT("closure_for_signature") FROM min_age_conv WHERE "field" = 'Sea (revised)'

Question: How many ILO codes are there with revising conventions of 'this convention, work in fishing convention'?
SQL: SELECT COUNT("ilo_code") FROM min_age_conv WHERE "revising_convention_s" = 'this convention, Work in Fishing Convention'

Question: What  was the revising convention of the field 'trimmers and stokers'?
SQL: SELECT "revising_convention_s" FROM min_age_conv WHERE "field" = 'trimmers and stokers'