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.

Sentence 1: Batalha Abbey (see page 45) was built in gratitude. Sentence 2: As a showing of thanks, Batalha Abbey was constructed.
yes

Sentence 1: It affects the lives of each and every American. Sentence 2: Every African is affected by it.
yes

Sentence 1: Other, more challenging choices, for which you should enlist the help of a guide, take you up to Mount Perdah (1,576 m/5,169 ft), Mount Jasar (1,696 m/5,562 ft), and Mount Beremban (1,841 m/6,040 ft). Sentence 2: The guide is well equipped with knowledge about the mountains. 

no