CREATE TABLE table_75420 ("Rank" CLOB, "City" CLOB, "Population" FLOAT, "Area  ( km 2  ) " FLOAT, "Density  ( inhabitants/km 2  ) " FLOAT, "Altitude  ( mslm ) " FLOAT)

Which Altitude (mslm) is the highest one that has a City of legnano, and a Population larger than 59492?
SELECT MAX("Altitude (mslm)") FROM table_75420 WHERE "City" = 'legnano' AND "Population" > '59492'
SELECT MAX("Altitude (mslm)") FROM "table_75420" WHERE "City" = 'legnano' AND "Population" > '59492'