Table: f1_sponsor_liveries
Columns: year
main_colour_s
additional_colour_s
livery
additional_major_sponsor_s

Question: What are the additional major sponsors which correspond to the additional color black and a year 1984?
SQL: SELECT "additional_major_sponsor_s" FROM f1_sponsor_liveries WHERE "additional_colour_s" = 'black' AND "year" = 1984

Question: What is the average year of entries with additional color black?
SQL: SELECT AVG("year") FROM f1_sponsor_liveries WHERE "additional_colour_s" = 'black'