This task is about translating a given Yoruba language sentence to English.
Q: Èyí tó ṣọṣẹ́ jù ni èyí tó wáyé ní October 23 lágbègbè Tarragona nígbà tí Odò Francoli kún àkúnya.
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The most serious of these occurred on October 23 in the province of Tarragona when the Francolí River turned into a raging flood.