Assertion: city | /r/HasProperty | protected
Facets:
value: historically
type: TEMPORAL
value: due to location
type: CAUSE
value: to flooding
type: CAUSE
value: very
type: DEGREE
value: due to poor natural drainage
type: CAUSE
value: due to low lying elevation
type: CAUSE
value: due to such factors as high rainfall
type: CAUSE
Source sentences:
text: Being separated from the city, on the west bank of the river Tiber, the area was an outcrop of the city that was protected by being included within the walls of Leo IV (847–855), and later expanded by the current fortification walls, built under Paul III (1534–1549), Pius IV (1559–1565), and Urban VIII (1623–1644).
text: The city has historically been very vulnerable to flooding, due to such factors as high rainfall, low lying elevation, poor natural drainage and location next to multiple bodies of water.