<|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: nhanes i and ii data can be directly accessed and downloaded from http://www.cdc.gov/nchs/nhanes/prior_nhanes.htm. the biennial survey of education documents are published in book format and widely available in many university libraries. the authors accessed the book format versions from harvard university education school gutman library. interested parties can request an interlibrary loan via worldcat.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>