<|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: due to ethical restrictions and our commitment to the terms under which the tunisian and the imperial college ethics committees granted us permission to conduct this research, data from the bold study are available upon request to the authors, who may be contacted at national heart and lung institute, imperial college london, royal brompton campus, london, united kingdom.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>