query: SELECT first_name FROM Professionals UNION SELECT first_name FROM Owners EXCEPT SELECT name FROM Dogs
question: For professionals or owners as dog names Find a first names what which are used them which are not used.
query_toks: SELECT first_name FROM Professionals UNION SELECT first_name FROM Owners EXCEPT SELECT name FROM Dogs
query_toks_no_value: select first_name from professionals union select first_name from owners except select name from dogs
question_toks: For professionals or owners as dog names Find a first names what which are used them which are not used.