using unique function on column 2 and keep first col

2012 12 14
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Hi sorry for this simple question
G =
1 2
1 3
1 5
5 10
6 10
8 13
9 13
10 13
12 13
13 14
unique(G(:,2));
result :
ans =
2
3
5
10
13
14
i want it to bring the first column with it like this and save it in same array or another new array
G =
1 2
1 3
1 5
5 10
8 13
13 14
Thanks

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