<|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: Figure 4 .
4Observational stations of selected networks and their relative density for (a) ground-based atmospheric and greenhouse gas, (b) ground-based meteorological and (c) oceanic observation on and around the African continent. More detailed information of the represented networks can be found in table 2 of the supplementary material. The heatmaps are based on kernel density estimations of all stations of the considered networks within a bounding box of 40 to −40 degrees latitude and −50 to 80 degrees longitude. Note that the operational status of each station has not been taken into account since this information was not available for all networks. The source for the station **data** for most of the networks is the WMO's OSCAR tool.
<|eot_id|><|start_header_id|>assistant<|end_header_id|>

no<|eot_id|>