<|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: brain tumor image data used in this work were obtained from the miccai 2012 challenge on multimodal brain tumor segmentation (http://www.imm.dtu.dk/projects/brats2012) organized by b. menze, a. jakab, s. bauer, m. reyes, m. prastawa, and k. van leemput. the challenge database contains fully anonymized images from the following institutions: eth zurich, university of bern, university of debrecen, and university of utah.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>