News editors obtained the following quote from the background information suppli ed by the inventors:“The present invention relates to a work management system including working rob ots. “Conventionally, there has been known a method for collecting balls dispersed ov er a work area (field) by operating an automatic ball collecting vehicle. See Ja panese Patent Application Laid-Open No. 2008- 220935. The entire contents of this disclosure are hereby incorporated by reference. With this conventional art, in formation relating to the distribution of balls in the work area is determined, and the vehicle is guided around the work area to automatically collect the balls.
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