Qual é o valor médio do painel agrícola com um painel trabalhista inferior a 1, um valor total inferior a 21 e um valor da National University of Ireland superior a 0?
CREATE TABLE table_name_53 (agricultural_panel INTEGER, national_university_of_ireland VARCHAR, labour_panel VARCHAR, total VARCHAR)
SELECT AVG(agricultural_panel) FROM table_name_53 WHERE labour_panel < 1 AND total < 21 AND national_university_of_ireland > 0