<|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: data are available upon request due to ethical restrictions. interested researchers may submit requests to jun.prof. dr. jacob spallek, project leader, bielefeld university, for access to the data. all requests will be assessed by ms. ines meyer, data protection officer, bielefeld university. contact: bielefeld university, postfach 10 01 31, d-33501 bielefeld, germany. e-mail: jacob.spallek@uni-bielefeld.de.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>