Example 1:
Reference: 
Shanghai is the largest city and financial center in China, with one of the busiest ports in the world. It is a center for commerce, finance, culture, and international exchange in China. Shanghai's economic strength, international influence, and urban development rank among the top cities in China.
Key_Information: 
Shanghai is the largest city and financial center in China, with one of the busiest ports in the world.
Answer_A: 
Shanghai is one of the largest cities in China and an important financial center.
Answer_B: 
Shanghai is the largest city and financial center in China.
Answer_A Relevance to Key Information: High Relevance to Reference: Medium
Score Justification: Answer 1 covers the core parts of the key information but does not fully cover all the points mentioned in the reference sentence. Nevertheless, the sentence is coherent and complete.
Answer_B: Relevance to Key Information: High Relevance to Reference: High
Score Justification: Answer 2 conforms to the key information and also covers the key points of the reference sentence. It is concise and strong, forming a complete sentence.
I prefer Answer_B

Example 2:
Reference: 
Guangzhou is an important city in southern China and a crucial window for foreign trade and international exchange. As a manufacturing center in China, Guangzhou has a strong industrial base and hosts many large enterprises and production bases.
Key_Information: 
Guangzhou is an important city in southern China and a crucial window for foreign trade.
Answer_A: 
Guangzhou is an important city in southern China and a window for foreign trade.
Answer_B: 
Guangzhou is an important city in southern China and a window for foreign trade.
Answer_A: Relevance to Key Information: High Relevance to Reference: Medium
Score Justification: Answer 2, while covering the core information of the key information, is expressed too briefly and the sentence is not complete.
Answer_B: Relevance to Key Information: Medium Relevance to Reference: Medium
Score Justification: Answer 1 covers the main information in the key information but does not mention the manufacturing center and industrial base stated in the reference sentence. The sentence is complete and coherent.
I prefer Answer_A.
