How many U.S. presidents died in office of natural causes?
4
2
2
2
2
3
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
7
5
1
0
2
3
4
7
5
1
2
3
0
4
7
5
1
2
3
4
7
0
5
1
2
3
6
4
7
5
1
0
3
6
4
7
5
1
3
6
0
4
7
5
1
3
6
4
7
0
5
1
6
4
7
8
5
1
9
6
7
8
5
9
6
7
8
5
9
6
7
8
5
9
6
7
8
5
9
6
7
8
5
11
13
9
6
7
8
11
13
9
6
7
8
11
13
9
6
7
8
11
10
13
9
6
7
8
11
10
13
9
6
7
8
11
10
13
9
6
7
8
11
10
13
9
6
8
11
10
13
9
6
8
11
10
13
9
No
6
12
265