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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: the ethical approval to access cris data (oxfordshire research ethics committee c 08/h0606/71+5) requires the data to be stored behind an nhs firewall with access governed by a patient-led oversight committee. for this reason, the data cannot be made available in the manuscript, supporting information files or a public repository. however, subject to approval from the oversight committee, data access for research purposes is possible by contacting robert stewart (robert.stewart@kcl.ac.uk) who is the academic lead for the cris data resource.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>