<|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: this study is based on data from the national health insurance research database provided by the national health insurance administration, ministry of health and welfare and managed by national health research institutes (nhri). due to legal and ethical restrictions, researchers should contact nhri (http://nhird.nhri.org.tw/) for access of the data after approved by institutional review board.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>