<|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 from the copenhagen city heart study are subject to protection from the national danish data protection agency and we are not allowed to share the data ourselves. however, interested researchers can contact members of the copenhagen city heart study steering committee (https://www.frederiksberghospital.dk/afdelinger-og-klinikker/oesterbroundersoegelsen/styringsgruppe/sider/default.aspx) to request data access. additional data are available upon request and requests may be made to the corresponding author.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>