answer ask communication concept doubt help illustration mark problem query Question question mark sign speak symbol why crowd going home metro Mexico on the move passengers people public transportatio railroad subway train transport antenna clouds day flag house houses mast nice Poland polish polish flag roof sky sunshine telecommunication weather brown card isolate isolated jazza label labeled labels old orange package paper post tag tagged vintage white business computer e-mail email ICT internet keyboard laptop linux microsoft notebook office screen ubuntu work www audio ball black copyspace equipment grid instrument microphone mike object pro professional sphere tool wire wired advice alert announcement antennae appropriate-behavior appropriate-behaviour avoid be-careful bees beware buzzing care caution color colors colour colours communicating community concern danger dangerous furry hairy hive honey-bees information informing insects movement on-guard pollinators protective risk risks risky safety signs soldier-bees striped swarm swarming transparent warning warning-sign wings cable cables connect connection data net network networking speed technology tele web wires artistic artwork coloration colored coloured conditional conditions contrast copper-art copper-work copperwork coppery craftsmanship decorative designed distinctive embossed embossing expressing expression eye-catching impressed indication informative insiders lettering limited-access no-public-access notification notifying patterned patterns perspectives presentation prohibition restriction security staff-only words workers