question: What is the population density of the largest Canton of Graubunden , located in the Alps ?
answer: 27 / km ² ( 70 / sq mi )
turker_answer: the population density of the largest Canton of Graubunden , located in the Alps is , 27 / km ² ( 70 / sq mi )
rule-based: The population density of the largest Canton of Graubunden , located in the Alps is 27 / km ² ( 70 / sq mi .