user: Question: When Altos Hornos Zapla is the  home (1st leg) what is overall amount of 1st leg?
Columns: ['Home (1st leg)', 'Home (2nd leg)', '1st Leg', '2nd leg', 'Aggregate']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Guaraní', 'Platense', '0-0', '0-1', '0-1']
SQL:

assistant: SELECT COUNT("1st Leg") FROM "Table" WHERE "Home (1st leg)" = 'Altos Hornos Zapla';