<|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: most survey data are publicly available. data for persons 15-17 from nhanes are available at the nchs research data center for researchers who meet the criteria for access to confidential data. census data are publicly available. surveillance data are available through reports and the nchhstp atlas; age stratifications were run specifically for this report.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>