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.
[[-8, -39, 42, 10, -70], [47, -29, -43], [23, -130, -104, 6], [-64, -54, -13, -197]]