locationPatternTimeline axis is valid_time — when each source says the fact was true in the world, not when Dontopedia learned about it. Retracted rows are kept for provenance; coloured stripes indicate the context kind.
doc:genealogy/frontier-massacres/10611# Frontier conflict event: Attack on Europeans/others - crew and passengers of the brig Maria on the coast and islands north of Cardwell (26 February 1872) Source dataset: University of Newcastle, "Colonial Frontier Massacres in Australia …
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