<|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 relevant to the two dimensional, uni-directional flow and two dimensional, bi-directional flow experiments is available at http://www.asim.uni-wuppertal.de/database/own-experiments/corridor.html. data relevant to the stadium experiment is from the analysis of flow-influencing factors in mouths of grandstands study whose authors may be contacted at a.seyfried@fz-juelich.de.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>