<|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 author obtained the data analyzed in this article from the roper center for public opinion research, cornell university (formerly at the university of connecticut). the first data set is entitled pew research center poll # 2008-02eco: february economy survey [uspew2008-02eco]. the second data set is entitled pew research center poll: february 2012 political survey [uspew2012-02pol]. both data sets are available to those who have access to the roper center's data repository. the data also appear to be available directly from the pew research center to scholars who fill out a personal information form and agree to the pew research center's dataset use agreement, which prohibits the user from reproducing, distributing or transferring the data to any other party.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>