Assertion: antenna | /r/HasProperty | constructed
Facets:
value: by combining a number of elements
type: MANNER
value: during the 1920s
type: TEMPORAL
Source sentences:
text: More powerful antennas were constructed during the 1920s by combining a number of elements in a systematic array.
text: There are places, that we mentioned earlier, that won't allow antennas, towers or antenna poles to be constructed.