| 1 | He was the breadwinner of his family. | |
| 2 | They are the backbone of the factory. | |
| 3 | The young people will be the pillar of society. | |
| 4 | In a written statement, Obama described her as "the cornerstone" of his family. | |
| 5 | For the following decade, CORONA became the backbone of American intelligence on the Soviet Union. |
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