user: Question: What's the number of verbal nouns with the basic stem (root) -bil-?
Columns: ['Basic stem (root)', 'Present stem', 'Non-present stem', 'Participle', 'Verbal noun', 'Short stem', 'Meaning']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['-tor-', '-ator-', '-etor-', 'e-torr-i', 'e-tor-tze', 'e-tor', "'come'"]
SQL:

assistant: SELECT COUNT("Verbal noun") FROM "Table" WHERE "Basic stem (root)" = '-bil-';