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_47 ( altitude__mslm_ INTEGER, city VARCHAR, population VARCHAR )

### Question ###
Which Altitude (mslm) is the highest one that has a City of legnano, and a Population larger than 59492?

### Accurate SQL ###

SELECT MAX(altitude__mslm_) FROM table_name_47 WHERE city = "legnano" AND population > 59492