user: Question: Which Altitude (mslm) is the highest one that has a City of legnano, and a Population larger than 59492?
Columns: ['Rank', 'City', 'Population', 'Area (km 2 )', 'Density (inhabitants/km 2 )', 'Altitude (mslm)']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1st', 'Milano', 1336879.0, 181.76, 7355.2, 122.0]
SQL:

assistant: SELECT MAX("Altitude (mslm)") FROM "Table" WHERE "City" = 'legnano' AND "Population" > 59492.0;