Assertion: electronic piano | /r/HasProperty | developed with amplified electric pianos
Facets:
Source sentences:
text: With technological advances, amplified electric pianos (1929), electronic pianos (1970s), and digital pianos (1980s) have been developed.
text: With technological advances, amplified electric pianos (1929), electronic pianos (1970s), and digital pianos (1980s) have been developed.