<|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 data analyzed in this paper are available upon request because they were obtained from a third party and contain sensitive health and personal information. the agincourt data are available upon request as described on their data overview website (http://www.agincourt.co.za/index.php/data/) and by contacting their data manager (datamanager@agincourt.co.za). the africa centre data are available upon request as described on their data overview website (http://www.africacentre.ac.za/default.aspx?tabid=69) and by contacting key personnel who can appropriately direct their request (info@africacentre.ac.za).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>