The screenshot below shows - correctly - a result when searching for John the Baptist being the subject of the lemma γίνομαι in Mark

But right-clicking on the verb in the text doesn't show that it is tagged with John.
Similarly in Mark 1:14 the verb "went" isn't tagged with the person Jesus

but in Mark 1:29 it is (along with his disciples)

I feel I haven't grasped how this works
Can anyone advise / comment?
Thanks, Graham