<|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: data are held by the center for analysis and management of multicenter aids cohort study (camacs). for access to the macs data, please complete the collaboration concept sheet and identify the article for which the data were used. this form and instructions may be found at: http://statepi.jhsph.edu/macs/forms.html.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>