<|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 are owned by the american indian tribes, and they do not allow unrestricted access to the data for ethical reasons. data are available at the coordinating center at the university of oklahoma and can be accessed following the procedures approved by the strong heart study publication and presentation committee (http://strongheart.ouhsc.edu/). readers may contact dr. elisa t. lee (elisa-lee@ouhsc.edu) to request access to the data.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>