Table: black_globe_winners
Columns: year
actor
award
series
result

Question: What is the average year that Idris Elba was nominated for or won an award?
SQL: SELECT AVG("year") FROM black_globe_winners WHERE "actor" = 'idris elba'

Question: What actor was nominated for or won an award before 1971?
SQL: SELECT "actor" FROM black_globe_winners WHERE "year" < 1971