retrieval system evaluation contains 6 documents {d1, d2, d3, d4, d5, d6} and 2 queries {q1, q2}, assume the relevance scores of the six documents to q1 is {3, 4, 2, 1, 5, 0} and to q2 is {6, 3, 2, 1, 0, 0}. Given two information retrieval algorithms, if their rankings of the six documents based on the queries are as follows (left for q1 and right for q2): rank Ground Truth IR IR2 rank Ground Truth IR IR2 d5 d5 d5 1 d1 d1 d1 d2 d2 d1 d2 d4 d2 d1 d1 d3 d3 d2 d3 13 14 d3 d5 123

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