<|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: all relevant data are available on request from the author. ethical restrictions prohibit public data sharing. the restricted sample size and time of study duration in an easily identifying prenatal ward could allow identifying members of our study population and therefore compromising patient confidentiality or participant privacy.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>