<|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 authors do not own the data. the twitter dataset is owned and provided by professor jure leskovec from stanford university. the twitter data set used in this study is available at https://snap.stanford.edu/data/bigdata/twitter7/tweets2009-12.txt.gz. 
the citation is: j. yang, j. leskovec. temporal variation in online media. acm international conference on web search and data mining (wsdm ï11), 2011. interested researchers can also request the data set directly from professor leskovec (via jure@cs.stanford.edu).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>