CREATE TABLE table_name_31 (catalogno VARCHAR2, year VARCHAR2, remark VARCHAR2)

What catalogno was in 1971 and had a remark of #27 us?
SELECT catalogno FROM table_name_31 WHERE year = 1971 AND remark = "#27 us"
SELECT "catalogno" FROM "table_name_31" WHERE "#27 us" = "remark" AND "year" = 1971