| 1 | In what sense are they landmarks? | |
| 2 | The Statue of Liberty is one of New York's landmarks. | |
| 3 | Boundary monuments built on East China Sea. | |
| 4 | And a boundary marker serves as a symbol of the demarcation line. | |
| 5 | Their findings left them in shock. It seems that some pigeons use motorway junctions and landmarks to remember where they are. |
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