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Stands
for an individual
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unable
to be named when
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program is written
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Names
an individual
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that has
parts
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likes(john, mary)
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book(dickens, Z,
cricket)
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f(x)
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[1, 3, g(a), 7, 9]
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-(+(15, 17), t)
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15 + 17 - t
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X
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Gross_pay
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Diagnosis
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_257
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_
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alpha17
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gross_pay
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john_smith
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dyspepsia
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+
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=/=
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’12Q&A’
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0
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1
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57
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1.618
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2.04e-27
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-13.6
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