application

$tax_query = array(
	array(
		'taxonomy'         => 'rwl-tags-ch1',
		'field'            => 'term_id',
		'operator'         => 'IN',
		'include_children' => true,
	),
	array(
		'taxonomy'         => 'rwl-tags-ch1',
		'field'            => 'term_id',
		'operator'         => 'IN',
		'include_children' => true,
	),
	array(
		'taxonomy'         => 'rwl-tags-ch1',
		'field'            => 'term_id',
		'operator'         => 'IN',
		'include_children' => true,
	),
);