Assertion: electroencephalograph | /r/HasProperty | instrument
Facets:
Source sentences:
text: In 1929 German scientist Hans Berger published the results of the first study to employ an electroencephalograph, an instrument that measures and records these brain-wave patterns.
text: In 1929 German scientist Hans Berger published the results of the first study to employ an electroencephalograph, an instrument that measures and records these brain-wave patterns.