Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE exhibition_record ( exhibition_id number, date text, attendance number )
TABLE: CREATE TABLE artist ( artist_id number, name text, country text, year_join number, age number )
TABLE: CREATE TABLE exhibition ( exhibition_id number, year number, theme text, artist_id number, ticket_price number )

### Question ###
What are the names and year of joining for artists that do not have the country 'United States'?

### Accurate SQL ###

SELECT name, year_join FROM artist WHERE country <> 'United States'