| http://www.w3.org/ns/prov#value | - Most of the boards were clearly visible and recognizable at up to 200 m, with the exception of Boards Nos. 2, 6 and 7.When observed from different distances using the IR camera (passive observation), none of the distinctive emblems on the eight boards (red crosses made of different types of material and using different kinds of paint) was either visible or recognizable.
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