Assertion: krypton's role | /r/HasProperty | important
Facets:
Source sentences:
text: Krypton played an important role in science from 1960-1983, when the length of the meter was defined as 1,650,763.73 times the wavelength of the orange-red light emitted by krypton-86.
text: Krypton has an important role in production and usage of the krypton fluoride laser.
text: Krypton has an important role in production and usage of the krypton fluoride laser.
text: Krypton has an important role in production and usage of the krypton fluoride laser.