user: Question: What is the average number of metres for the Dzelzavas street 74?
Columns: ['Rank', 'Name', 'City', 'Metres', 'Floors']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [1.0, 'Z-Towers', 'Riga', 133.0, 34.0]
SQL:

assistant: SELECT AVG("Metres") FROM "Table" WHERE "Name" = 'Dzelzavas street 74';