CREATE TABLE table_name_10 (number VARCHAR, name VARCHAR, builder VARCHAR, date VARCHAR)

What number has the builder ruston hornsby, the date 1961, and the name Topsy?
SELECT COUNT(number) FROM table_name_10 WHERE builder = "ruston hornsby" AND date = 1961 AND name = "topsy"
SELECT COUNT("number") FROM "table_name_10" WHERE "builder" = "ruston hornsby" AND "date" = 1961 AND "name" = "topsy"