Name a type of worker who often goes on strike.
| 1 | assembly line | |
|---|---|---|
| 1 | Factory | 35 |
| 1 | plant | |
| 1 | mill | |
| 1 | manufacturing | |
| 1 | factory | |
| 2 | airline | |
| 2 | plane | |
| 2 | Teachers | 8 |
| 3 | building | |
| 3 | construction | |
| 3 | carpenter | |
| 4 | teachers | |
| 4 | profs | |
| 4 | professors | |
| 4 | educators | |
| 4 | instructors | |
| 5 | drivers | |
| 5 | bus drivers | |
| 6 | collectors | |
| 6 | garbage collectors | |
| 6 | trash man | |
| 6 | garbageman |