CREATE TABLE table_52735 ("Number" FLOAT, "Name" TEXT, "Builder" TEXT, "Type" TEXT, "Date" FLOAT)

What is the name of the train numbered less than 6 before 1993?
SELECT "Name" FROM table_52735 WHERE "Number" < '6' AND "Date" < '1993'
SELECT "Name" FROM "table_52735" WHERE "Date" < '1993' AND "Number" < '6'