CREATE TABLE table_64027 ("Class to 1928" CLOB, "Class from 1928" CLOB, "Seats" CLOB, "Quantity" FLOAT, "Year ( s )  of Manufacture" CLOB, "Remarks" CLOB)

Which class to 1928 value had years of manufacture of 1921/23 and class from 1928 of BCi-21?
SELECT "Class to 1928" FROM table_64027 WHERE "Year(s) of Manufacture" = '1921/23' AND "Class from 1928" = 'bci-21'
SELECT "Class to 1928" FROM "table_64027" WHERE "Class from 1928" = 'bci-21' AND "Year(s) of Manufacture" = '1921/23'