<|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 mrc clinical trials unit at ucl for researchers who meet the criteria for access to confidential data. the data are freely available from the principal investigator, professor kholoud porter (kholoud.porter@ucl.ac.uk), to whom all such requests should be made.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>