relation team

$tax_query = array(
	'relation' => 'OR',
	array(
		'taxonomy'         => '_team_manager',
		'terms'            => '520',
	),
	array(
		'taxonomy'         => '_team_researchers',
		'terms'            => '520',
	),
	array(
		'taxonomy'         => '_team_engineers',
		'terms'            => '520',
	),
	array(
		'taxonomy'         => '_team_phd',
		'terms'            => '520',
	),
	array(
		'taxonomy'         => '_team_contractual',
		'terms'            => '520',
	),
);