Update README.md

Author: jackbergus

README.md

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 This repository provides a preliminary implementation of the Generalised Semistructured Model and of its associated language,
 Generalised Semistructured Query Language, as well.
 
+## Authors
+
+ * Giacomo Bergami (2023 - )
+ * Wiktor Zegadło (2023)
+
 ## MetaModel
 
 A preliminary implementation of ```Script v2.0``` is provided in [this](https://github.com/datagram-db/gsm_gsql/tree/withscript) branch, as well as the implementation of some examples of such language from the paper [TBA]. The original implementation from Giacomo Bergami's PhD dissertation is available on [BitBucket](https://bitbucket.org/unibogb/gsql-script/src/master/).