Update README.md

README.md

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 "EN-CLDI" (en-cldi) contains 1690 classes, which contains images paired with verbs and adjectives. Each word within this set is unique and paired with at least 22 images.. 
 
-It is the English subset of CLDI (cross-lingual dictionary induction) dataset from ([Hartmann and Søgaard, 2018](https://aclanthology.org/W18-3021/)). 
+It is the English subset of CLDI (cross-lingual dictionary induction) dataset from ([Russakovsky, O., Deng, J., Su, H., Krause, J., Satheesh, S., Ma, S., ... & Fei-Fei, L. (2015).](https://link.springer.com/article/10.1007/s11263-015-0816-y)). 
 
 # How to Use