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.
[[50, 39, -71, -47], [-115, -87, 13, 53, -161, -188, -171], [-59, 21, -106, -59, -151, -187], [-143, 65, 87, -8, 32]]