Assertion: medium tank | /r/HasProperty | the m11-m13 series
Facets:
Source sentences:
text: A medium tank, based on the Vickers Six-Tonner, was the M11-M13 series which had a very good 47 mm gun, but very thin armor.
text: A medium tank, based on the Vickers Six-Tonner, was the M-11-M13 series.