$field_value = get_field('tag_', $term->term_id, 'about_schema');
Argument 1: $field name = “tag_”: is this the field name?
Argument 2: $post_id: In this case use either $term or 'term_'.$term->term_id
Argument 3: $format: should be true or false, any non empty value will evaluate to true.
