CREATE TABLE table_203_764 (id NUMBER, "name" CLOB, "date" NUMBER, "nation" CLOB, "displacement" CLOB, "speed" CLOB, "number" NUMBER, "notes" CLOB)

in 1968 italy used alpino class frigate . what was its top speed ?
SELECT "speed" FROM table_203_764 WHERE "name" = 'alpino-class frigate'
SELECT "speed" FROM "table_203_764" WHERE "name" = 'alpino-class frigate'