Assertion: american bison's number | /r/AtLocation | the neighborhood of 480,000
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Source sentences:
text: Taking the lesser number, in order to be below the truth rather than above it, we find that the number actually seen on that day by Colonel Dodge was in the neighborhood of 480,000, not counting the additional number taken in at the view from the top of Pawnee Rock, which, if added, would easily bring the total up to a round half million!