Assertion: tank's machine gun | /r/HasProperty | added for the driver
Facets:
value: from 9 to 12 mm
type: OTHER
Source sentences:
text: The armor was increased from 6 to 8 mm (0.24 to 0.31 in) and from 9 to 12 mm (0.35 to 0.47 in) and a fixed machine gun was added for the driver.