update readme

README.md

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 **Dataset Info:**
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 This dataset consists of oral history content collected from the Istorima archive, including transcribed interviews and associated metadata. The material reflects personal narratives and life stories, primarily in Greek, covering a wide range of social, cultural, and historical topics.
 
 
 **Metadata Info:**
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 This dataset consists of 13,548 oral history interview records, structured as a tabular dataset with mixed data types. Each record includes a unique identifier (id, int32) along with textual fields such as title, 
 summary, transcription, speaker_name, and researcher_name. Additional metadata fields capture thematic and categorical information (themes, tags), 
 geographic references (geonames, interview_place), and temporal attributes (date, published_at). 
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 **Metadata Field Descriptions:**
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 | Field | Type | Description |
 |---|---|---|
 | `id` | int | Unique numeric identifier for the interview, as assigned by the Istorima archive (ranges from 9790 to 267770, not sequential). |
@@ -32,6 +35,7 @@ as well as a language field indicating the interview language.
 
 
 **Dataset Statistics:**
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 Words:
 96,479,186
 
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 **License:**
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 This dataset is licensed under the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0). Any commercial use requires prior written permission from Istorima. All intellectual property rights remain with Istorima.
 
 
 **Dataset Moved:**
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 This dataset is now hosted by the Mozilla Data Collective. Please use the official link below for the most up-to-date version: