<|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: all data referred to in the manuscript are available on line. The air quality data is collected from https://www.zq12369.com/environment.php. The traffic data, including intracity traffic (the monthly passenger population, 104 person/time) and intercity traffic (the monthly public transport population, 104 person/time) were adapted from the Transport Bureau of Shenzhen Municipality (http://jtys.sz.gov.cn/zwgk/sjfb/index.htm). The travel intensity (TI) of Shenzhen was collected from Baidu Qianxi (http://qianxi.baidu.com/). The data of COVID-19 confirmed cases were collated from the Shenzhen Municipal Health Commission (http://wjw.sz.gov.cn/yqxx/202004/t20200420_19176831.htm).    https://www.zq12369.com/environment.php   http://jtys.sz.gov.cn/zwgk/sjfb/index.htm   http://qianxi.baidu.com/   http://wjw.sz.gov.cn/yqxx/202004/t20200420_19176831.htm<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>