[{"field":"unit","field_label":"Unit of measure","field_values":[{"label":"Number","value":"NR"},{"label":"Year","value":"YR"}]},{"field":"indic_de","field_label":"Demographic indicator","field_values":[{"label":"Total fertility rate","value":"TOTFERRT"},{"label":"Mean age of women at childbirth","value":"AGEMOTH"},{"label":"Median age of women at childbirth","value":"MEDAGEMOTH"}]},{"field":"freq","field_label":"Time frequency","field_values":[{"label":"Annual","value":"A"}]}]