<|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 is publicly available at http://apps.who.int/healthinfo/systems/surveydata/index.php/catalog/sage/about and it can be obtained by sending a request email to sagesurvey@who.int. we have accessed data from the world health organizations who multi-country studies data archive for study on global ageing and adult health (sage). data accession number for india - study on global ageing and adult health-2007, wave 1 is 638 (http://apps.who.int/healthinfo/systems/surveydata/index.php/access_licensed/track/638) and for china - study on global ageing and adult health-2007/10, wave 1 is 635 (http://apps.who.int/healthinfo/systems/surveydata/index.php/access_licensed/track/635).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>