Transposing and aggregating Oracle column data

Transposing and aggregating Oracle column data

I have the following data

I have the following data

Base          End
RMSA          Item 1
RMSA          Item 2
RMSA          Item 3
RMSB          Item 1
RMSB          Item 2
RMSC          Item 4

I want to convert it to the following format

    Key           Products
    RMSA;RMSB     Item 1, Item 2
    RMSA          Item 3
    RMSC          Item 4

Basically, those with similar results should be grouped into 1 line. However, I can't seem to get it to work using listagg, etc since I'm grouping on two columns.

Is there any way to do this with a direct Oracle query?

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