The following example defines a Monte Carlo sampler with three nested loops. The outer loop has 10 samples, the middle has 5, and the inner has 2. The columns are defined by 5 distributions, the first three are associated with the outer loop, the second 2 with the middle, and the last one with the inner.
nested_mc_0,nested_mc_1,nested_mc_2,nested_mc_3,nested_mc_4,nested_mc_5
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