query: SELECT T1.staff_name ,  T3.first_name ,  T3.last_name FROM Staff AS T1 JOIN Engineer_Visits AS T2 ON T1.staff_id  =  T2.contact_staff_id JOIN Maintenance_Engineers AS T3 ON T2.engineer_id  =  T3.engineer_id
question: Which staff have done a-contacted which engineers? Are Listing the staff name and the engineer first name and last name.
query_toks: SELECT T1.staff_name , T3.first_name , T3.last_name FROM Staff AS T1 JOIN Engineer_Visits AS T2 ON T1.staff_id = T2.contact_staff_id JOIN Maintenance_Engineers AS T3 ON T2.engineer_id = T3.engineer_id
query_toks_no_value: select t1 . staff_name , t3 . first_name , t3 . last_name from staff as t1 join engineer_visits as t2 on t1 . staff_id = t2 . contact_staff_id join maintenance_engineers as t3 on t2 . engineer_id = t3 . engineer_id
question_toks: Which staff have done a-contacted which engineers? Are Listing the staff name and the engineer first name and last name.