CREATE TABLE table_75912 ("Rank" FLOAT, "Name" TEXT, "Built" FLOAT, "Height" TEXT, "Floors" FLOAT)

What is the lowest Floors, when Built is greater than 1970, and when Name is NV Building 3?
SELECT MIN("Floors") FROM table_75912 WHERE "Built" > '1970' AND "Name" = 'nv building 3'
SELECT MIN("Floors") FROM "table_75912" WHERE "Built" > '1970' AND "Name" = 'nv building 3'