query for section references in content of posts

$inv_funds_meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => 'content',
		'value'   => '2.1,2,2,2,3',
		'compare' => 'IN',
		'type'    => 'CHAR',
	),
	array(
	),
);