Assertion: erbium's use | /r/AtLocation | laser
Facets:
Source sentences:
text: Two common uses of erbium today are in lasers and special kinds of optical fibers.
text: The most important uses of erbium are in lasers and optical fibers.
text: Two common uses of erbium today are in lasers and special kinds of optical fibers.
text: Two common uses of erbium today are in lasers and special kinds of optical fibers.
text: The most important uses of erbium are in lasers and optical fibers.