<|begin_of_text|><|start_header_id|>system<|end_header_id|>

You are an expert at identifying data availability statements in scientific text. A data availability statement describes where research data can be found or how it can be accessed.<|eot_id|><|start_header_id|>user<|end_header_id|>

Determine if the following text contains a data availability statement. Answer with 'yes' or 'no'.

Text: the raw data about export flows has been purchased from cepii (http://www.cepii.fr/cepii/en/bdd_modele/presentation.asp?id=1), see baci dataset. however, the use of this dataset is not exclusive and anyone can purchase it. a free version for academic and research institutions is available on the united nations comtrade website (http://comtrade.un.org/), see the trade dataset.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>