我可以使用纯文本调用Polly服务。然而，我现在要做的就是将带有书签的文本传递给它（因为我想控制Polly放置timimg离子信息的位置），但是看不到如何将它传递给Polly？
SynthesizeSpeechRequest synthesizeSpeechRequest = new SynthesizeSpeechRequest()
.withOutputFormat(OutputFormat.Json)
.withSpeechMarkTypes(SpeechMarkType.Ssml)
.withVoiceId(VoiceId.Joanna)
.withText("<Mark> This is a sample <Mark> text to be synthesized");
SynthesizeSpeechResult synthesizeSpeechResult = client.synthesizeSpeech(synthesizeSpeechRequest);
但我总是收到以下错误
Exception caught: com.amazonaws.services.polly.model.SsmlMarksNotSupportedForTextTypeException: SSML Speech marks are not supported for this text type (Service: AmazonPolly; Status Code: 400; Error Code: SsmlMarksNotSupportedForTextTypeException; Request ID: 79daa5cc-0ce0-11e8-a64d-ef4f40dcae18)