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 table_8381 ( "Pick" real, "Player" text, "Pos." text, "Nationality" text, "Team" text, "Previous team" text, "NBA years [a ]" text, "Career with the franchise [b ]" text )

### Question ###
What is Nationality, when NBA years [a ] is '1', and when Previous Team is 'Seattle Supersonics'?

### Accurate SQL ###

SELECT "Nationality" FROM table_8381 WHERE "NBA years [a ]" = '1' AND "Previous team" = 'seattle supersonics'