<|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 cannot be made publicly available because this dataset has been purchased from cepii (http://www.cepii.fr/cepii/en/bdd_modele/presentation.asp?id=1). 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 but differently from cepii dataset, these data are missing from data sanitation. the details of the data sanitation are public and reported in reference 35 of the present paper.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>