亚马逊理解的正确假设文件和政策文件是什么

我有以下文件:

                            {
                              "Version": "2012-10-17",
                              "Statement": {
                                "Effect": "Allow",
                                "Principal": {"Service": "comprehend.amazonaws.com"},
                                "Action": "sts:AssumeRole"
                              }
                            }

以及以下保单文件:

{
                                  "Version": "2012-10-17",
                                  "Statement": {
                                    "Effect": "Allow",
                                    "Action": "s3:GetObject",
                                    "Resource": "arn:aws:s3:::${bucket.name}/*"
                                  }
                                }

不幸的是,我从亚马逊了解到 NO_READ_ACCESS_TO_INPUT: The provided data access role does not have proper access to the input data. . 发生了什么?

完整的源代码如下: https://github.com/SnipHubNet/SnipHubNet.github.io/blob/master/snippets/201902/src/test/kotlin/AmazonComprehend3Snippet.kt