user
Instruction
Answer the question based on the provided table.


Table
Table Title: 'Filmography' regarding 'Robert Urich'
Table Content:
| Year | Title | Role | Notes |
| --- | --- | --- | --- |
| 1973 | Magnum Force | Officer Mike Grimes | - |
| 1982 | Endangered Species | Ruben Castle | - |
| 1984 | The Ice Pirates | Jason | - |
| 1984 | Invitation to Hell | Matt Winslow | - |
| 1985 | Turk 182 | Terry Lynch | - |
| 1988 | April Morning | Joseph | Credit at beginning only |
| 1989 | Dragon Fight | Airport Police | - |
| 1992 | Jock: A True Tale of Friendship | Rocky | Alternative title: Jock of the Bushveld |
| 1992 | Revolver | Nick Clayton | - |
| 1994 | Jock of the Bushveld | Rocky Mountain Jack | - |
| 1996 | Young Again | Michael Riley, Age 40 | - |
| 1996 | The Angel of Pennsylvania Avenue | Angus Feagan | - |
| 2002 | Clover Bend | Bill | - |


Question
In what decade was Robert Urich most prolific?


Answer Format
The final answer should be a sentence and use the following format:
```json
{
    "answer": "your_generated_sentence_here"
}
```
rule
["From 1980 to 1989, Robert Urich was the most prolific, starring in six films: Endangered Species, The Ice Pirates, Invitation to Hell, Turk 182, April Morning, and Dragon Fight."]