Assertion: led's color | /r/HasProperty | red
Facets:
value: usually
type: DEGREE
value: by 2017
type: TEMPORAL
Source sentences:
text: By 2017 the only color developed was red.
text: The most common colors of LEDs are orange, yellow, green and red.
text: Another limiting factor was color, until the 70’s the only color that could be produced by an LED was red.
text: Usually the color is red.
text: The most common colors are red and green, but there are even blue ones.