merge and reset a merge based on cell content

Trying to break this down into small chunks:
Can anyone help with a macro or formula that combines the text and ">" symbol for each course grouping of text and resets itself for each blank cell between the last text from the previous course and the start of the next course.

Example of data and output (column D) is attached.

This will be used for several thousand courses on data migration, so manual is not an option.
Thanks.
Gene



Similar to my last post, but I'm trying to do this in chunks.

Thank you.
Gene