<|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 authors do not own the raw data underlying this study. all relevant data are publicly available from the national center for health statistics via the centers for disease control and prevention (cdc) wonder system at the following url: http://wonder.cdc.gov/.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>