CREATE TABLE table_71241 ("Name" CLOB, "Street address" CLOB, "Years as tallest" CLOB, "Height ft  ( m ) " CLOB, "Floors" CLOB, "Architect" CLOB)

How many years as tallest building was Independence Hall?
SELECT "Years as tallest" FROM table_71241 WHERE "Name" = 'independence hall'
SELECT "Years as tallest" FROM "table_71241" WHERE "Name" = 'independence hall'