Complex sentence: During the process, a mob of peasantry accuse Prince Stennis of poisioning Saskia, in which Geralt caval, and was subsequently found and captured by spies from the empire of Nilfgaard.
Split into simpler sentences: During the process, a mob of peasantry accuse Prince Stennis of poisoning Saskia, Geralt intervened. However, she was subsequently found and captured by spies from the empire of Nilfgaard.