Assertion: acre's area | /r/HasProperty | 792 458 of a second
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Source sentences:
text: It is defined as the area of a square with side measures of one meter, where the meter is currently defined as the distance traveled by light in 1/299 792 458 of a second when expressed in the unit m·s-1, where the second is defined in terms of the cesium frequency, ΔνCs.