TASK DEFINITION: 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.
PROBLEM: Sentence 1: This proved highly dangerous to pilgrims who approached the abbey across the sands (the causeway joining the island to the mainland was not built until 1874). Sentence 2: Many pilgrims perished en route to the abbey.

SOLUTION: no

PROBLEM: Sentence 1: There was an enormous sphere of thin crystal to represent the sky. Sentence 2: The crystal is very expensive and precious.

SOLUTION: no

PROBLEM: Sentence 1: He brought along this whole plane full of African-Americans, and some of our really fine citizens are African-Americans in government, in business, in athletics, in show business. Sentence 2: African-Americans were brought along by him, a whole plane full of them.

SOLUTION:
yes