Table: single_hits_1971_canada
Columns: volume_issue
issue_date_s
weeks_on_top
song
artist

Question: What is Song, when Weeks on Top is 1,  and when Volume:Issue is 15:6?
SQL: SELECT "song" FROM single_hits_1971_canada WHERE "weeks_on_top" = 1 AND "volume_issue" = '15:6'

Question: What is Song, when Volume:Issue is 15:19-20?
SQL: SELECT "song" FROM single_hits_1971_canada WHERE "volume_issue" = '15:19-20'

Question: What is Volume:Issue, when Weeks on Top is less than 5, and when Issue Date(s) are 10 July - 24 July?
SQL: SELECT "volume_issue" FROM single_hits_1971_canada WHERE "weeks_on_top" < 5 AND "issue_date_s" = '10 july - 24 july'