nested taxonomy

$tax_query = array(
	'relation' => 'AND',
	array(
		'relation' => 'OR',
		array(
			'taxonomy'         => 'category',
			'terms'            => 'mycat',
			'field'            => 'slug',
			'include_children' => true,
		),
		array(
			'taxonomy'         => 'tag',
			'terms'            => 'mytag',
			'field'            => 'slug',
			'operator'         => 'IN',
		),
	),
	array(
		'taxonomy'         => 'tax2',
		'terms'            => 'jorgs',
		'field'            => 'slug',
		'operator'         => 'IN',
		'include_children' => true,
	),
);