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Man lifeguard rubbing eyes with fists, red lifeguard shirt on amsterdam street by canal lights; tired duty vigilance.
Young hispanic man in camouflage uniform cups his hands around mouth shouting at building entrance; vigilance duty.
Livestock guardian dog howling in winter pasture while another rests nearby, symbolizing vigilance, protection and traditional rural farming life
Lifeguard man in red shirt holds binoculars to eyes and peers along a wet street market; vigilance duty.

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