How many presidents of the United States have been assassinated?
4
4
2
4
2
4
2
4
2
4
3
2
4
3
2
4
3
2
4
3
2
4
3
2
5
4
3
2
5
4
3
1
2
5
4
3
1
2
5
4
3
1
2
5
4
3
1
2
5
4
3
1
2
5
4
3
1
2
5
4
0
3
1
2
5
4
3
1
2
0
6
7
5
4
3
1
2
6
0
7
5
4
3
1
2
6
7
5
0
3
1
6
7
5
3
1
0
6
7
5
3
1
6
0
7
5
3
1
6
7
5
8
1
6
7
5
8
1
6
7
5
8
1
6
13
9
7
5
8
1
6
13
11
9
7
5
8
1
6
13
11
9
7
8
Four
1
6
13
11
9
7
8
Four
6
13
11
9
7
8
Four
6
13
11
9
7
8
Four
6
13
11
9
7
8
Four
6
13
11
9
7
8
Four
6
13
11
9
7
8
Four
14
6
13
11
9
7
8
Four
14
6
13
11
9