Analytics/Mar_19/example.csv

id,Country,Age,Sex
1,India,10,M
2,India,NaN,F
3,China,43,M
4,Italy,NaN,F
5,India,18,M
6,China,15,F
7,Italy,34,M
8,China,20,F
9,China,NaN,M
10,Italy,30,F