CREATE TABLE table_12456 ("year" CLOB, "opus" CLOB, "town" CLOB, "kind" CLOB, "manuals" CLOB, "stops" CLOB)

What are the manuals with a kind of r, and an opus of 144?
SELECT "manuals" FROM table_12456 WHERE "kind" = 'r' AND "opus" = '144'
SELECT "manuals" FROM "table_12456" WHERE "kind" = 'r' AND "opus" = '144'