user
Instruction
Answer the question based on the provided table.


Table
Table Title: 'Television credits' regarding 'Mitchell Kriegman'
Table Content:
| Year | Title | Role | Network | Notes |
| --- | --- | --- | --- | --- |
| 1975 | The Marshall Klugman Show | Writer, director, producer, actor | WNET | - |
| 1980 | Saturday Night Live | Writer, filmmaker, actor | NBC | - |
| 1984 | Mouseterpiece Theater | Director, writer, producer | The Disney Channel | - |
| 1987 | Operation X | Writer, actor | PBS | - |
| 1988 | Encyclopedia | Writer | HBO | - |
| 1988 | ALF Tales | Writer | NBC | - |
| 1989 | The Sweet Life | Producer | Comedy Central | - |
| 1989 | Higgins Boys and Gruber | Writer, producer | Comedy Central | - |
| 1991 | Doug | Story editor | Nickelodeon | - |
| 1991 | Rugrats | Story editor | Nickelodeon | - |
| 1991 | Ren & Stimpy Show | Story editor | Nickelodeon | - |
| 1991-1994 | Clarissa Explains It All | Executive producer, creator, story editor | Nickelodeon | - |
| 1996 | Mr. Willowby's Christmas Tree | Writer (adapted from Robert Barry book) | CBS | - |
| 1996 | Twisted Puppet Theater | Co-creator, producer | Showtime | - |
| 1997 | Student Bodies | Executive consultant | YTV, FOX | - |
| 2002–Present | Bear in the Big Blue House | Creator, writer, director, producer | Disney Channel | - |
| 2006-Present | The Book of Pooh | Creator, director, writer (based on A. A. Milne’s book of tales) | Disney Channel | - |
| 2005 | Life with Derek | Creative consultant | Disney Channel | - |
| 2006-2010 | It's a Big Big World | Creator, writer, producer, co-director | PBS | - |


Question
What did Mitchell Kriegman write and develop in 1991?


Answer Format
The final answer should be a sentence and use the following format:
```json
{
    "answer": "your_generated_sentence_here"
}
```
rule
["In 1991, Kriegman became involved in the writing and development of Doug, Rugrats, and the Ren & Stimpy Show for Nickelodeon."]