Assertion: photograph | /r/CapableOf | exist boston
Facets:
value: no longer
type: TEMPORAL
Source sentences:
text: However, the photographs he produced no longer exist and therefore the earliest surviving aerial photograph is titled 'Boston, as the Eagle and the Wild Goose See It.' Taken by James Wallace Black and Samuel Archer King on October 13, 1860, it depicts Boston from a height of 630m.