Assertion: tall tower | /r/HasProperty | built
Facets:
value: for crossing wide rivers
type: PURPOSE
Source sentences:
text: Despite training for the moment for my entire career, I was a bit stunned when Neal Stephenson asked me if a 20 km tall tower could be built.
text: For crossing wide rivers and straits with flat coastlines, very tall towers must be built due to the necessity of a large height clearance for navigation.