<|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 author confirms that, for approved reasons, some access restrictions apply to the data underlying the findings. all relevant data are within the paper and reference 4: evaluation of the aashto design equations and recommended improvements, strategic highway research program, national research council, washington, dc, 1994. (shrp-p-394, isbn 0-309-05803-1, product no.: 5000).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>