Update README.md

README.md

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 ## Model description
 
-This model was trained from scratch using [Marian NMT](https://marian-nmt.github.io/) on a combination of Spanish-Basque datasets totalling 104,417,271 sentence pairs. 12,091,549 sentence pairs were parallel data collected from the web while the remaining 92,325,722 sentence pairs were parallel synthetic data created backtranslating [Oscar](https://oscar-project.org/) Spanish monolingual dataset. The model was evaluated on the Flores, TaCon and NTREX evaluation datasets.
+This model was trained from scratch using [Marian NMT](https://marian-nmt.github.io/) on a combination of Spanish-Basque datasets totalling 104,417,271 sentence pairs. 12,091,549 sentence pairs were parallel data collected from the web while the remaining 92,325,722 sentence pairs were parallel synthetic data created backtranslating a random subset of [Oscar](https://oscar-project.org/) Spanish monolingual dataset. The model was evaluated on the Flores, TaCon and NTREX evaluation datasets.
 
 - **Developed by:** HiTZ Research Center & IXA Research group (University of the Basque Country UPV/EHU)
 - **Model type:** traslation
@@ -67,7 +67,7 @@ The Spanish-Basque data collected from the web was a combination of the followin
 | WikiMatrix	           | 154,281                   |
 | **Total**     	       | ** 12,091,549 **             |
 
-The 92,325,722 sentence pairs of synthetic parallel data were created by backtranslating the EusCrawl Basque monolingual dataset using a previous version (without synthetic parallel data) of the [ES-EU translator from the HiTZ center](https://huggingface.co/HiTZ/mt-hitz-es-eu).
+The 92,325,722 sentence pairs of synthetic parallel data were created by backtranslating the Oscar Spanish monolingual dataset using a previous version (without synthetic parallel data) of the [ES-EU translator from the HiTZ center](https://huggingface.co/HiTZ/mt-hitz-es-eu).
 
 
 ### Training Procedure