不同表上的Doctrine joinColumns（Symfony）

Question

I am stucked to a problem building the database with Dcotrine and YAML.

I have the following tables 'product', 'station' and 'station_description'.

I want to store the description of the 'station' in dependent on the station and the product. For Example I have the following setup:

Station_A and Product_1 --> show Description 1

Station_A and Product_2 --> show Description 2

Station_B and Product_1 --> show Description 3

I knew exactly how I would solve the problem if I use SQL, but with Doctrine I find no approach how to declare the relations.

Does anyone have a solution to that problem?

Thanks a lot!