<|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 nshap wave 2 data described here are publicly available through the national archive of computerized data on aging (nacda, https://www.icpsr.umich.edu/icpsrweb/nacda/). the software used here to simulate both the staircase and constant stimuli protocols is available at (http://rcg-software.uchicago.edu/stata) in a package called olfactsim for use with stata, and includes a description of the steps necessary to evaluate a new or existing protocol.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>