| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | blue line | Canada | Blue line commonly refers to a subway or metro line on public transportation maps. | 1 |
| 2 | blue line | Canada | In the context of public transportation, the blue line is a common designation for a specific subway or metro route. | 1 |
| 3 | blue line | Canada | In the context of transportation, the blue line typically refers to a specific subway or metro line. | 1 |