Here's the scenario:
<tbody>
Column A
Column B
Column C
Column D
14
195
Skeleton
14
195
Skeleton
17
32787
Costume
Fales
17
5695
Costume
True
17
698974
Costume
False
23
30073
Witch
False
23
2757
Witch
True
23
999999
Witch
False
</tbody>
In a worksheet with over 10,000 lines...