<|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 danish twin registry is a public register administered in accordance with danish law and the dtr makes data available to researchers after they have applied and their project has been approved by the dtr scientific board. instructions on how to apply and a link to the data request application form can be found here: http://www.sdu.dk/en/om_sdu/institutter_centre/ist_sundhedstjenesteforsk/centre/dtr/researcher. data from the human mortality database are accessible at http://www.mortality.org/.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>