<|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: in the switchbox study all data are encoded by a unique switchbox study number (swbx-number) and stored in the switchbox database at the lumc. within this study it is necessary to retain the possibility to, for example, send participants newsletters with study results or to invite them to join in future research projects. for this reason the key to trace back this unique swbx-number to a specific individual was not destroyed. the switchbox database is not publicly available, because all participants gave written informed consent to share their data with third parties, but only in anonymized form.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>