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_71383 ( "Name" text, "Street address" text, "Years as tallest" text, "Height ft / m" text, "Floors" real )

### Question ###
Name the years as tallest when floors are larger than 18

### Accurate SQL ###

SELECT "Years as tallest" FROM table_71383 WHERE "Floors" > '18'