<|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 authors confirm that all data underlying the findings are fully available without restriction. data are available from the ouagadougou health and demographic surveillance system for researchers who meet the data use agreement criteria. the data use agreement form is available at http://www.issp.bf/opo/english/convention/acces-donnees.html.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>