What's the number of verbal nouns with the basic stem (root) -bil-?
{'header': ['Basic stem (root)', 'Present stem', 'Non-present stem', 'Participle', 'Verbal noun', 'Short stem', 'Meaning'], 'page_title': '', 'page_id': '', 'types': ['text', 'text', 'text', 'text', 'text', 'text', 'text'], 'id': '1-12784134-1', 'section_title': '', 'caption': '', 'rows': [['-tor-', '-ator-', '-etor-', 'e-torr-i', 'e-tor-tze', 'e-tor', "'come'"], ['-bil-', '-abil-', '-ebil-', 'i-bil-i', 'i-bil-tze', 'i-bil', "'go about'"], ['-kar-', '-akar-', '-ekar-', 'e-karr-i', 'e-kar-tze', 'e-kar', "'bring'"], ['-uka- (< -duka-)', '-auka-', '-euka-', 'e-duki', 'e-duki-tze', 'e-duki', "'hold, have'"], ['(irregular: see below)', '(irregular: see below)', '(irregular: see below)', 'i-za-n', 'i-za-te', 'i-za-n', "'be', auxiliary"], ['-go-', '-ago-', '-ego-', 'e-go-n', 'e-go-te', 'e-go-n', "'stay, be'"], ['-oa-', '-oa-', '-i(h)oa-', 'j-oa-n', 'j-oa-te', 'j-oa-n', "'go'"], ['-rama-', '-arama-', '-erama-', 'e-rama-n', 'e-rama-te', 'e-rama-n', "'take'"]], 'name': 'table_12784134_1'}