human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Rank, Common of, Population, Area (km 2 ), Density (inhabitants/km 2 ), Altitude (mslm)
###Question: What rank is the common with an area of 47.3 km^2?
gpt
SELECT Rank FROM table WHERE Area (km 2 ) = 47.3