<|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: the data the study are based upon are potentially patient identifiable. as such, they are not publically available. they may be accessed, however, if researchers acquire section 251 approval and appropriate ethical approvals from the national cancer intelligence network http://www.ncin.org.uk/collecting_and_using_data/data_access.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>