Passages with multiple answer spans

[TZeng20]

Hi,
I'm trying to implement the reader model training in Tensorflow. How does DPR deal with multiple answer spans in a positive passage?
Will there just be multiple positions labelled as the correct start/end position?

E.g. if there are 2 answer starts in a passage (h_i, h_j), would the model try to maximise the scores for tokens i and j using cross entropy loss?