<|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: chlorophyll-a and nutrient data are available on the dryad data repository (doi: doi:10.5061/dryad.k37q7; url: http://dx.doi.org/10.5061/dryad.k37q7) and polycyclic aromatic hydrocarbon data are available on the joint oil sands monitoring information portal (url: http://jointoilsandsmonitoring.ca/pages/browse.aspx#&&sites=&rdsid=47d9f211-f1d7-4cd7-aec1-f4fc9b655038&page=0&orgname=).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>