user: Question: How many conversions had 0 pens and 0 tries?
Columns: ['Player', 'Tries', 'Conv', 'Pens', 'Drop', 'Venue', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Severo Koroduadua Waqanibau', '0', '18', '0', '0', 'Apia', '10/09/1983']
SQL:

assistant: SELECT SUM("Conv") FROM "Table" WHERE "Pens" = '0' AND "Tries" = '0';