Assertion: sun's center | /r/HasProperty | visible
Facets:
value: per definition
type: OTHER
value: at the arctic circle
type: LOCATION
value: without refraction by the atmosphere
type: OTHER
value: during one summer night
type: TEMPORAL
Source sentences:
text: Even though at the Arctic Circle the center of the Sun is, per definition and without refraction by the atmosphere, only visible during one summer night, some part of the midnight sun is visible at the Arctic Circle from approximately 12 June until 1 July.