<|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 relevant data and model equations concerning impact baseline model runs can be obtained from http://www.ifpri.org/book-751/ourwork/program/impact-model. the following data has been deposited to http://thedata.harvard.edu/dvn/dv/ifpri: baseline crop and livestock yield, crop area harvested and livestock number growth rates; changes in fertilizer application (2050), cultivated land and pasture area (year 20002050); basin efficiencies by fpu (2000, 2010, 2050); trade parameters pse, cse, mi. the following data obtained from http://www.earthstat.org: base year fertilizer application rates (year 2000), yields and area of seven mayor crops for yield gap analysis (year circa 2000), attainable yield estimates of seven mayor crops for yield gap analysis (year 2000). 5 arc minute geographical dataset on aboveground carbon stocks by main land use types can be obtained from: http://cdiac.ornl.gov/; 5 arc minute resolution global soil organic carbon map in the top 1 m can be obtained from: http://eusoils.jrc.ec.europa.eu/esdb_archive/octop/global.html. 1 km resolution bird species presence can be obtained from: http://sedac.ciesin.columbia.edu/data/set/species-v1-americas-bird-presence; 300 meter resolution 2009 global land cover and land use map can be obtained from: http://due.esrin.esa.int/globcover/.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>