<|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 available from the china statistical yearbook of health and family planning 2013 and china national health accounts report 2013. all the data in the china statistics yearbook of health and family planning 2013 may be found the website of the published institution, centre for health statistics information, national health and family planning commission, peoples republic of china. (http://www.nhfpc.gov.cn/htmlfiles/zwgkzt/ptjnj/year2013/index2013.html). interested researchers may obtain the china national health accounts report 2013 through most online bookstores.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>