Assertion: searchlight | /r/HasProperty | needed
Facets:
value: in flying at increasingly higher altitudes
type: OTHER
Source sentences:
text: In order to reach bombers now flying at increasingly higher altitudes, more powerful searchlights were needed.
text: Searchlights were of great importance in the Second World War as they were needed to illuminate the German Bombers flying over Britain, so that the men operating the anti-aircraft guns could shoot them down before they had a chance to drop any bombs on the British towns and cities.