In this task, you are given a list. This list contains many lists of integers. The list is several items written within a []. Your task is to find the maximum number among the members of each inner list. The output should be a list comprised of the maximums with the same order as the internal lists.
[[-56, -189, 0], [-61, 35, -111, -59], [53, -53, 82, 65, 90, 47, 47], [53, 71, -87]]