<|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: all data and documentation files are available from the national data archive of the kenya national bureau of statistics (knbs) (http://statistics.knbs.or.ke/nada/index.php/catalog/82). the data may be accessed by making a request through email datarequest@knbs.or.ke. the contact person in case of technical questions is the director, population & social statistics, knbs.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>