<|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 on earthquakes and economic variables are publicly available online and free of charge from the global significant earthquake database at the national oceanic and atmospheric administration (http://www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=1&d=1), u.s. geological survey (http://earthquake.usgs.gov), world bankís world development indicators (http://data.worldbank.org/data-catalog/world-development-indicators), and world bankís world integrated trade solutions (http://wits.worldbank.org). data on stock market indices are available from thomson reuters datastream by subscription services.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>