How many U.S. presidents owned slaves?
12
2
2
3
2
4
3
2
4
3
2
4
3
2
4
1
3
2
4
1
3
2
4
1
3
2
4
5
1
3
2
4
5
1
3
2
4
5
1
3
2
4
5
1
3
2
4
5
1
3
2
4
5
1
3
2
4
5
1
3
2
4
7
5
0
1
3
2
4
7
5
1
0
3
2
4
7
5
1
3
2
4
0
7
5
1
6
3
2
4
7
5
0
1
6
3
4
7
5
1
0
6
3
4
7
8
5
1
6
0
7
8
5
1
6
7
8
5
0
1
6
7
8
5
1
6
7
8
5
6
7
8
5
9
6
7
8
5
9
6
7
8
9
6
7
8
13
9
6
7
8
13
9
6
7
8
13
9
6
11
7
8
13
9
6
11
7
8
13
9
6
11
7
8
13
9
6
11
10
8
13
9
6
11
10
8
12
13
9
6
11
10
8
12
13
9
6
11
10
265
265