related tax

$tax_speaker = array(
	'relation' => 'AND',
	array(
		'taxonomy'         => 'cpt_speaker',
		'field'            => 'term_id',
		'operator'         => 'IN',
	),
	array(
		'taxonomy'         => 'tax_room',
		'field'            => 'term_id',
		'operator'         => 'IN',
	),
);