Table: vannelli_chart_data
Columns: year
song
canada_singles
us_hot_100
us_a_c

Question: What is th US A.C. in 1985 with a US hot 100 of 57?
SQL: SELECT "us_a_c" FROM vannelli_chart_data WHERE "year" = 1985 AND "us_hot_100" = '57'

Question: What is the Canada singles in 1979 with a US A.C. of 24?
SQL: SELECT "canada_singles" FROM vannelli_chart_data WHERE "year" = 1979 AND "us_a_c" = '24'

Question: What is the US A.C. in 1974?
SQL: SELECT "us_a_c" FROM vannelli_chart_data WHERE "year" = 1974