<|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 from the medical research council's cognitive function and ageing study (cfas) ethics committee for researchers who meet the criteria for access to confidential data. data may be requested from linda barnes (leb22@medschl.cam.ac.uk) or from the cfas website (http://www.cfas.ac.uk/).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>