Detailed Instructions: From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.
Q: Given Relationship: 'attack', Sentence: 'The Japanese attack on the United States Pacific Fleet at Pearl Harbor occurred when Japan and the United States were at peace and while Japanese and American diplomats were discussing diplomatic solutions to the problems that had arisen between the two countries .'
A:
attack