Newsroom Source Trace

The facts in today's news and where each one comes from. Outlets and wires are read as they publish; sentences that state the same fact are linked across outlets and languages and traced to one source: the one the articles name, else the wire that carried it first, else a hypothetical common source.

Archiveloading
Countries
Groups
Outlets

Daily summary

last poll –
articles analysed
with readable text
facts in two or more sources
traced to a named source
traced to a wire
first on social media
without a visible origin
What produced the articles
Wire copy or creditSame text as another outletRelays other mediaOwn sourcingNo visible sourceFirst on social media
NZZ
Blick
20 Minuten
Tages-Anzeiger
St. Galler Tagblatt
Le Temps
Zeit
The Times
FT
BBC
NYT
Bloomberg
Reuters
AP
dpa
Keystone-SDA
Keystone-ATS
Geopolitics Prime

The right-hand number is the share credited to or copied from a wire. Wire copy can only be recognised against wire text we read (dpa, the swissinfo subset of Keystone-SDA/ATS, AP and Reuters on Yahoo), so it is a lower bound.

Most traced sources
  • agency
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  • agency
  • agency
  • agency
  • agency
  • agency
  • agency
  • agency

Pick a fact to see where it comes from.

How it works and how far to trust it

Evidence

Agency credits in bylines and credit lines; sentences copied word for word from wire copy or another outlet; embedded posts; and sources named in the text ("wie Reuters berichtete", "told the BBC", "said on X"), found by rules for German, English and French plus a name tagger.

Linking facts

Two sentences state the same fact when they are each other's best match between their articles and their similarity is at least 0.825 (multilingual paraphrase model). On 150 hand-labelled pairs that gives precision 0.89 and recall 0.65. A fact holds at most one sentence per article.

Events: articles that share two or more facts report the same story; communities of such articles (Louvain) form an event, titled after its earliest article. A fact joins the event holding most of its articles; one shared sentence alone does not join two stories.

Named sources

On held-out hand-labelled sentences: precision 0.83, recall 0.64. Agencies, outlets and platforms are the most reliable types. A pronoun speaker ("she said") is not resolved to a name.

Limits

Wire use is a lower bound: there is no AFP, PA or full Reuters/AP/SDA text. FT, NYT and Bloomberg give headlines and teasers only. Times are publication times; an updated article keeps its first time, so "first retrieved" is approximate.

time zone Europe/Zurich