query: SELECT member_name FROM member EXCEPT SELECT T1.member_name FROM member AS T1 JOIN party_events AS T2 ON T1.member_id  =  T2.member_in_charge_id
question: What the name of member which ain't in charge of any event?
query_toks: SELECT member_name FROM member EXCEPT SELECT T1.member_name FROM member AS T1 JOIN party_events AS T2 ON T1.member_id = T2.member_in_charge_id
query_toks_no_value: select member_name from member except select t1 . member_name from member as t1 join party_events as t2 on t1 . member_id = t2 . member_in_charge_id
question_toks: What the name of member which ain't in charge of any event?