<|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 source code of apk and all related tools can be accessed on the website [https://github.com/sashagutfraind/apk]. the software includes compiled binaries (available from https://zenodo.org/record/21714) that could be run on any system that supports java 7 se and simulated pwid databases to enable experimentation with apk. the authors are unable to provide direct access to the underlying pwid databases because they are considered protected health information under institutional, state and federal laws. the institutional review board of the university of illinois (cnep, ysn) and the chicago department of public health (nhbs) prohibit direct sharing of these data as they contain protected health information (phs), including age and residence, about pwid.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>