<|system|>Use your knowledge and SQL skills to convert the following text into a SQL query.
Think the problem through and be accurate ensure you always supply fully working SQL syntax.

SQL Statments should be wrapped in <codestart type="sql"> and </codeend> tags.

Example output:
<codestart type="sql">SELECT * FROM table_name;</codeend>
<codestart type="sql">SELECT column_name FROM table_name WHERE column_name = 'value';</codeend><|end|><|user|>Which service id and type has the least number of participants?

SQL Table Create Statement:
CREATE TABLE Participants_in_Events (Participant_ID VARCHAR, Event_ID VARCHAR); CREATE TABLE services (Service_Type_Code VARCHAR, service_id VARCHAR); CREATE TABLE EVENTS (service_id VARCHAR, Event_ID VARCHAR); CREATE TABLE participants (Participant_ID VARCHAR)<|end|><|assistant|><codestart type="sql">SELECT T3.service_id, T4.Service_Type_Code FROM participants AS T1 JOIN Participants_in_Events AS T2 ON T1.Participant_ID = T2.Participant_ID JOIN EVENTS AS T3 ON T2.Event_ID = T3.Event_ID JOIN services AS T4 ON T3.service_id = T4.service_id GROUP BY T3.service_id ORDER BY COUNT(*) LIMIT 1</codeend><|end|>