How many U.S. presidents have been assassinated?
4
2
4
2
4
2
4
3
2
4
3
2
4
3
2
4
3
2
4
3
2
4
3
5
2
4
3
5
2
4
1
3
5
2
4
1
3
5
2
4
1
3
5
2
4
1
3
5
2
4
1
3
5
2
4
1
3
5
2
0
4
1
3
7
5
6
2
4
1
3
7
0
5
6
2
4
1
3
7
0
5
6
2
4
1
3
7
5
6
2
0
4
1
3
7
5
6
1
3
7
0
5
6
1
3
7
0
5
6
1
7
8
5
6
0
1
7
8
5
6
1
9
7
8
5
6
1
9
7
8
11
5
6
13
1
9
7
8
11
5
6
13
1
9
7
8
11
6
13
1
9
7
8
11
6
13
9
7
8
11
6
13
9
7
8
11
6
13
9
7
8
11
6
13
9
7
8
11
6
13
9
7
8
11
10
6
13
14
9
7
8
11
10
6
13
14
9
8
11
10
4 of them