user: Question: How many titles have directors of Matthew Penn and number in series of 143?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by:', 'Original air date']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [135.0, 1.0, '"Causa Mortis"', 'Ed Sherin', 'René Balcer', 'September 18, 1996']
SQL:

assistant: SELECT COUNT("Title") FROM "Table" WHERE "Directed by" = 'Matthew Penn' AND "No. in series" = 143.0;