Teacher:In this task, given a sentence in the English language, your task is to convert it into English Tokens.
Teacher: Now, understand the problem? Solve this instance: According to the Observatory, seismic activity caused a major lahar, similar to a mudslide or landslide, to occur in the Drift River Valley.
Student:

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
According to the Observatory , seismic activity caused a major lahar , similar to a mudslide or landslide , to occur in the Drift River Valley .