Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_4 (floors INTEGER, completed VARCHAR, rank VARCHAR)

### Question ###
What is the lowest amount of floors in the building completed before 1970 ranked more than 14?

### Accurate SQL ###

SELECT MIN(floors) FROM table_name_4 WHERE completed < 1970 AND rank > 14