By Cat Name

$tax_query = array(
	array(
		'taxonomy'         => 'conversion_widget_position',
		'terms'            => 'After Third Paragraph',
		'field'            => 'name',
		'operator'         => 'IN',
		'include_children' => false,
	),
	array(
		'taxonomy'         => 'post_tag',
		'terms'            => 'Home Improvement',
		'field'            => 'name',
		'operator'         => 'IN',
		'include_children' => true,
	),
);