<|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 restrictions imposed by the ethics committee of the rwth aachen university, data are available upon request. requests for the data may be sent to the corresponding author n. jon shah (n.j.shah@fz-juelich.de).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>