Parallel-process multiple Excel files by sheet name in a single KNIME workflow

Hi

I have multiple Excel files in a folder and want to process them in parallel in a single KNIME workflow. Each file should be processed based on its sheet names not file names: if a file has a specific sheet name, it should follow a particular workflow path. I want to have each file and its matching sheet name run concurrently. Please let me know starting few nodes for this.