x1 x2 effect censoring 0 0 9 1 1 0 6 1 0 1 21 1 0 1 13 1 1 0 31 1 0 1 16 1 1 0 16 1 0 0 4 1 0 0 6 1 0 1 3 1 0 0 10 1 1 0 27 0 1 0 7 1 0 1 21 1 0 0 15 1 0 0 3 1 1 0 28 0 0 1 7 1 1 0 28 0 0 0 4 1 1 0 15 1 0 1 11 1 0 1 27 0 0 1 14 1 0 1 8 1 1 0 18 1 0 0 9 1 0 1 8 1 0 0 9 1 0 1 8 1 0 0 6 1 0 0 9 1 1 0 8 1 0 0 9 1 0 1 19 0 1 0 4 1