<|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: ccdc no.1056579 contains the supplementary crystallographic data for this paper. these data can be obtained free of charge at www.ccdc.cam.ac.uk/conts/retrieving.html [or from the cambridge crystallographic data centre (ccdc), 12 union road, cambridge cb2 1ez, uk; fax: +44(0)1223 762911; email: deposit@ccdc.cam.ac.uk].<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>