<|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 were obtained from a third party (chiba city hall, national health insurance division, japan (http://www.city.chiba.jp/)). we made a contract with chiba city hall prohibiting us for disclosing any data provided without written consent. to request the data, please contact misuzu fujita (affiliation: department of public health, chiba university graduate school of medicine. adress: 1-8-1 inohana, chuo-ku, chiba 260-8670, japan. e-mail: fujitam@chiba-u.jp).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>