Assertion: polygon's area | /r/HasAspect | six german defensive positions
Facets:
value: by mid-1917
type: TEMPORAL
Source sentences:
text: By mid-1917, the area east of Ypres had six German defensive positions, the front position, the Albrechtstellung (second position), Wilhelmstellung (third position), Flandern I Stellung (fourth position), Flandern II Stellung (fifth position) and Flandern III Stellung (under construction).