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Custom taxonomy

$tax_query = array(
	array(
		'taxonomy'         => 'area',
		'terms'            => 'area-example',
		'field'            => 'slug',
	),
	array(
		'taxonomy'         => 'modality',
		'terms'            => 'modality-example',
		'field'            => 'slug',
	),
);