Arg0:protector
Arg1:protected
Arg2:danger
Arg3:instrument
| agentive subject and instrument (-) | |
|---|---|
|  | |
| Arg0: | *trace*=Republicans | 
| REL: | protect | 
| Arg1: | the measure | 
| Arg3-by: | combining it with two politically popular issues that Democrats would find hard to vote against. | 
| instrumental subject (-) | |
|---|---|
|  | |
| Arg3: | *trace-2*=*trace-1*=a bill | 
| REL: | protect | 
| Arg1: | rape victims | 
| Arg2-from: | unfounded interrogation | 
| passivized (-) | |
|---|---|
|  | |
| Arg1: | *trace*=The information | 
| REL: | protected | 
| Arg3-by: | attorney-client priviledge | 
The protector/instrument distinction largely comes down to intentionality. Instrumental subjects seem to be much more common.