user: Question: Name the Losing BP of Newport Saracens RFC and has a Lost of 19.
Columns: ['Club', 'Played', 'Drawn', 'Lost', 'Try BP', 'Losing BP']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Club', 'Played', 'Drawn', 'Lost', 'Try BP', 'Losing BP']
SQL:

assistant: SELECT "Losing BP" FROM "Table" WHERE "Lost" = '19' AND "Club" = 'Newport Saracens RFC';