A mobile robot includes a truck capable of traveling by servo control, a robot arm mounted on the truck, and a control portion servo-controlling the traveling of the truck. In the cascading symbol game, a gaming device generates and displays a symbol from a plurality of symbols for each of a plurality of symbol positions. The transmission is a high, object level format, which minimizes network traffic. The content metadata and real content ingest are synchronized on a video-on-demand system using the dynamically allocated content identifiers. Later visualization of the markers is readily accomplished using state-of-the-art imaging systems. The present invention also provides a method for suppressing weed growth, comprising applying a strain of Burkholderia andropogonis to a weed belonging to the order Caryophyllales.