diff --git a/app/graphql/types/funder_type.rb b/app/graphql/types/funder_type.rb
index 31a3afa7f..5ad819ca3 100644
--- a/app/graphql/types/funder_type.rb
+++ b/app/graphql/types/funder_type.rb
@@ -2,6 +2,9 @@
 
 class FunderType < BaseObject
   extend_type
+  # key fields: 'id'
+
+  # field :id, ID, null: false, description: "Crossref Funder ID", external: true
 
   field :datasets, FunderDatasetConnectionWithMetaType, null: false, description: "Funded datasets", connection: true, max_page_size: 100 do
     argument :first, Int, required: false, default_value: 25
diff --git a/app/graphql/types/person_type.rb b/app/graphql/types/person_type.rb
index 34e55ae53..1e7543eea 100644
--- a/app/graphql/types/person_type.rb
+++ b/app/graphql/types/person_type.rb
@@ -2,6 +2,9 @@
 
 class PersonType < BaseObject
   extend_type
+  # key fields: 'id'
+
+  # field :id, ID, null: true, description: "The ORCID ID of the person.", external: true
 
   field :datasets, PersonDatasetConnectionWithMetaType, null: true, description: "Authored datasets", connection: true, max_page_size: 100 do
     argument :first, Int, required: false, default_value: 25