<|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: source code for data retrieval and analysis is available at: github.com/jagstein/rankings-dz. analysis results are presented as supplemental data. underlying publication and clinical trial data is available at pubmed.gov and clinicaltrials.gov, respectively. impact factors are from: www.citefactor.org/journal-impact-factor-list-2012.html.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>