select assert_equals('Number of data sets', 2, count(*)) from external_data where location similar to 'Instance_[0-9A-F]+-[0-9A-F]+-[0-9A-F]+-[0-9A-F]+-[0-9A-F]+%';
select assert_equals('Number of data sets', 1, count(*)) from external_data where location like 'Instance_DB/%';
