In this task, you're given a pair of sentences, sentence 1 and sentence 2. Your job is to determine if the two sentences clearly agree/disagree with each other, or if this can't be determined. Indicate your answer as yes or no respectively.

[Q]: Sentence 1: Originally the post was simply an inter-city letter service. Sentence 2: The post used to be just for inter-city communications.
[A]: yes


[Q]: Sentence 1: The rugged peak of Arthur's Seat, 251 m (823 ft) in height, can be reached by footpaths all around its base. Sentence 2: There are numerous footpaths to reach the peak of Arthur's Seat.
[A]: yes


[Q]: Sentence 1: The disappearance of Jane Finn was forgotten and the whole affair was lost in oblivion." Mr. Carter paused, and Tuppence broke in impatiently: "But why has it all cropped up again?  Sentence 2: Jane Finn cropped up again because someone was doing research.  
[A]:
no