<|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: air pollution data used in this study are obtained from shanghai environmental monitoring center, which could also be accessed from the website (http://www.envir.gov.cn/airnews/index.asp) according to individual api (air pollution index) of each pollutant. daily meteorological data are freely available. the health data we used for this study are not publicly available. with a proper ethics approval, the data can be obtained by contacting ms. airong wang (email: war71@126.com) at shanghai health insurance bureau, which provides anonymized and de-identified health administrative data to researchers.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>