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Use "haystacks" in a sentence
"* A.I. systems that uncover the needles in haystacks of data, from software bugs to hidden genes."
"For the food: the day before the party some of the students and I made small cookies called haystacks (recipe to follow)."
"But, such wishful thinking leads nowhere; it amounts to the problem of simultaneously finding a million diamonds in a million multi-ton "haystacks" of identical looking cubic zirconia, and doing it quickly, thank you."