<|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 social network data are available from the sociopatterns project (http://www.sociopatterns.org/). the sexual network data are available from plos computational biology (doi: 10.1371/journal.pcbi.1001109). the livestock-trade data are available from bayerisches staatsministerium fùr ern_hrung, landwirtschaft und forsten (stmelf) (url: http://www.hi-tier.de; email: joern.gethmann@fli.bund.de).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>