<|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 were used with permission obtained from the mar-lc collaborative group investigators, who agreed to share their data with us by signing an amendment to the original protocol. the french data protection authority (cnil  commission nationale de l'informatique et des libertés) strictly forbids us to make data collected during clinical trials freely available. readers may contact the corresponding author at jean-pierre.pignon@gustaveroussy.fr to request the data.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>