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Use "spotters" in a sentence
"The cameras, to track drug pedlars and 'spotters' - people who act as a lookout for illegal suppliers - were targeted in Orts Road."
"Now the parade route is about 5 1/2 miles long and the people who drive these massive floats have absolutely no way to see where they're going, so they have to depend on people called spotters or observers to actually guide them along that route."
"Since then, U.S. officials speaking on the condition of anonymity have acknowledged the CIA has had a small number of so-called "spotters" on the ground to assist in the NATO mission."