I was looking for a native gantt chart node of knime but it seemed that it was not available. I found the "How to Create a Timeline" thread on KNIME forum and realized that they created a component with python code! However, for some reason, the Python View node generated some errors on my laptop and I'm not familiar with python code. So, I tried to create something similar by myself. The output seems to be same as the one with python code. However, if I increase number of inputs for each name, I get an error from Color Management node. That will be my next task to solve.