I have some metatranscriptome samples that have human contamination. I used kneaddata with the human transcriptome as the decontaminant database (–reference-db human_hg38_refMrna). After downstream processing with humann I found that a large % of the reads were unaligned so I looked at the first 30 reads or so and found the majority have a large stretch of polyA at the end of the sequence. The front half of these sequences blasts to human. Is there a good way to filter out these sequences with kneaddata?