Database: local_govt_in_alabama_minus_1_0
Question: Which service id and type has the least number of participants?
SQL: select t2.service_id , t3.service_type_code from participants_participants_in_events as t1 join events as t2 on t1.event_id = t2.event_id join services as t3 on t2.service_id = t3.service_id group by t2.service_id order by count ( * ) asc limit 1