<|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: the npp-viirs nsl data for 2015 are available from the ngdc website (http://ngdc.noaa.gov/eog/viirs/download_monthly.html). moderate-resolution imaging spectroradiometer (modis) 8-day composite imagery of nighttime land surface temperature (lst) (mod11a2-level 3) and the modis 16-day composite imagery of the normalized difference vegetation index (ndvi) is available from the data archive and distribution system of the national aeronautics and space administration (nasa) (http://ladsweb.nascom.nasa.gov). urban land data in china from 1992 to 2012 are from he et al. (2014) whose author may be contacted at hcy@bnu.edu.cn. landsat images are available from the geospatial data cloud, operated by the chinese academy of sciences (http://www.gscloud.cn). the 1990 national land use/cover dataset for china are available from the data sharing infrastructure of the earth system science at the chinese academy of science (http://www.geodata.cn). socioeconomic census data from 1992 and 2013, including the urban population and gross domestic product (gdp) of each province in china, are available from the statistical database of economic and social development by the national knowledge infrastructure of china (http://tongji.cnki.net).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>