<|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 on the daily number of newly confirmed COVID-19 cases at the city level in China are collected from the websites of provincial health commissions of China. Data on the daily weather characteristics are collected from the NOAA website. Data on the daily population flow intensity index from Wuhan to other cities are collected from the Baidu website. All these data are publicly available. The city-level characteristics are collected from China City Statistical Yearbooks.   https://www.ncdc.noaa.gov/cdo-web/   http://qianxi.baidu.com/?from=groupmessage<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>