[ { "min_n": 2, "max_n": 5, "prob_negative": 0.4, "prob_invalid": 0.2 }, { "min_n": 3, "max_n": 6, "prob_negative": 0.3, "prob_invalid": 0.4 }, { "min_n": 3, "max_n": 5, "prob_negative": 0.4, "prob_invalid": 0.2 }, { "min_n": 4, "max_n": 6, "prob_negative": 0.35, "prob_invalid": 0.35 } ]