Assertion: thames barrier | /r/HasProperty | closed
Facets:
Source sentences:
text: Once river navigation has been stopped and all gates closed, then the Thames Barrier itself can be closed.
text: The Thames Barrier has been closed 174 times since it first became operational in 1982 (correct as of March 2014).
text: The Thames Barrier has been closed 186 times since it became operational in 1982 (correct as of October 2019).