Assertion: sextant's filter | /r/CapableOf | allow direct observation of the sun
Facets:
value: for solar observations
type: PURPOSE
Source sentences:
text: For solar observations, filters allow direct observation of the sun.
text: For solar observations, filters allow direct observation of the sun.
text: For solar observations, filters allow direct observation of the sun.
text: For solar observations, filters allow direct observation of the sun.