question: Why was the border between Mexico and the United States established one league south of San Diego Bay 's most southern tip ?
answer: to include the entire bay within the United States
turker_answer: The border between Mexico and the United States was established one league south of San Diego Bay 's most southern tip in order to include the entire bay within the United States .
rule-based: The border between Mexico and the United States was established one league south of San Diego Bay 's most southern tip to include the entire bay within the United States .