<|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 practice level qof data is available as a supporting information file, "s1 dataset". the dataset from hammersmith & fulham pct is only available upon request for ethical and legal reasons due to its sensitive nature as it is derived from patients medical records. the authors signed a data sharing agreement with hammersmith & fulham pct stating that the data would not be shared with anybody outside the research group. interested researchers are asked to contact nhs england directly to request access to the data or should contact the database manager from department of primary care & public health, imperial college london, london, uk: mahsa mazidi (m.mazidi@imperial.ac.uk).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>