<|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 rwandan mobile phone data have been obtained directly from the mobile phone operator. this mobile phone operator retains ownership of these data and imposes standard provisions to their sharing and access which guarantee privacy. de-identified data are available from the engineering social systems group at harvard university (http://www.hsph.harvard.edu/ess/about.html) for researchers who meet the criteria for access to confidential data. our gis data can be used as-is to replicate the results presented has been uploaded to github, and it is available for download from https://github.com/adobra/rwandamobility.git.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>