SELECT 
	terminal_id 
FROM bg_person_answer 

WHERE   
	( question_id = 1 AND answer_id = 1 ) 

AND

	( question_id = 2 AND answer_id = 5 )


mysql> desc bg_person_answer;
+-------------+------------------+------+-----+---------------------+-------+
| Field       | Type             | Null | Key | Default             | Extra |
+-------------+------------------+------+-----+---------------------+-------+
| terminal_id | int(11) unsigned | NO   | MUL | 0                   |       |
| question_id | int(11) unsigned | NO   | MUL | 0                   |       |
| answer_id   | int(11) unsigned | NO   | MUL | 0                   |       |
| freetext    | text             | YES  |     | NULL                |       |
| date_time   | datetime         | NO   |     | 0000-00-00 00:00:00 |       |
+-------------+------------------+------+-----+---------------------+-------+