nitrogen	animal	body-wt
1.580000000e+001	1.000000000e+000	3.000000000e+001
2.130000000e+001	1.000000000e+000	6.000000000e+001
1.650000000e+001	1.000000000e+000	9.000000000e+001
1.640000000e+001	2.000000000e+000	3.000000000e+001
2.080000000e+001	2.000000000e+000	6.000000000e+001
1.820000000e+001	2.000000000e+000	9.000000000e+001
1.730000000e+001	3.000000000e+000	3.000000000e+001
2.380000000e+001	3.000000000e+000	6.000000000e+001
1.780000000e+001	3.000000000e+000	9.000000000e+001
1.640000000e+001	4.000000000e+000	3.000000000e+001
2.210000000e+001	4.000000000e+000	6.000000000e+001
1.750000000e+001	4.000000000e+000	9.000000000e+001