CREATE TABLE table_name_78 (name VARCHAR, city VARCHAR, years_as_tallest VARCHAR)

What is the name of the building that was the tallest from 1990 1997 in Frankfurt?
SELECT name FROM table_name_78 WHERE city = "frankfurt" AND years_as_tallest = "1990–1997"
SELECT "name" FROM "table_name_78" WHERE "1990–1997" = "years_as_tallest" AND "city" = "frankfurt"