[ { "roman_prob": 0.4, "min_a": 2, "max_a": 10, "min_b": 2, "max_b": 15 }, { "roman_prob": 0.7, "min_a": 2, "max_a": 25, "min_b": 2, "max_b": 15 }, { "roman_prob": 0.6, "min_a": 5, "max_a": 20, "min_b": 5, "max_b": 25 }, { "roman_prob": 0.3, "min_a": 2, "max_a": 20, "min_b": 2, "max_b": 20 } ]