Direct answer
Objectives follow journal display order. Some depend on your choices; follow the active objective in the game.
Result
In the Clan Dimun village Geralt spied a feverish man who was waiting for his brothers to bring his betrothed from one of the neighboring isles. Days had passed, their wedding drew nearer and nearer, and neither the brothers nor the betrothed had arrived. The man asked Geralt for help.
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