<|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: data are owned by and are available from the nigerian national demographic health survey 2008 site. permission was also obtained from the national population commission to use the data. data can also be obtained from the website of national bureau of statistics nigeria and must be properly cited.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>