CREATE TABLE table_name_26 (weeks_on_top VARCHAR2, artist VARCHAR2, issue_date_s_ VARCHAR2)

An artist of the Beatles with an issue date(s) of 19 September has what as the listed weeks on top?
SELECT weeks_on_top FROM table_name_26 WHERE artist = "the beatles" AND issue_date_s_ = "19 september"
SELECT "weeks_on_top" FROM "table_name_26" WHERE "19 september" = "issue_date_s_" AND "artist" = "the beatles"