Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Title | Role | Notes |
| --- | --- | --- | --- |
| 1974 | Sam | Sylvia Brightside |  |
| 1974 | Village Hall | Other Voter |  |
| 1974 | The Wheeltappers and Shunters Social Club | Waitress |  |
| 1972-1975 | Crown Court | Female Officer/Warder/Bedelia Conroy |  |
| 1973-1975 | Play for Today | Canteen Lady (sunset across the Bay [Alan Bennett]1975 /Striker/Mrs. Warboys/Enid |  |
| 1975 | Greenhill Pals | May | TV Film |
| 1976 | Open All Hours | Woman Outside Shop |  |
| 1978 | Z-Cars | Rose |  |
| 1978 | Selwyn | Mavis |  |
| 1979 | All Day on the Sands | Derek's mother | TV Film |
| 1997 | Coronation Street: Viva Las Vegas! | Vera Duckworth | Direct-to-video Coronation Street spin off |
| 1974, 1976-2008, 2010 | Coronation Street | Vera Duckworth | 2001 British Soap Award for Best On-Screen Couple (shared with William Tarmey)\n2008 British Soap Award Lifetime Achievement\nNominated - 1999 British Soap Award for Best On-Screen Partnership (shared with William Tarmey)\nNominated - 2008 Television and Radio Industries Club Award for TV Soap Personality |
Question:
when was the first time elizabeth dawn appeared in her role as vera duckworth?
Answer:
1997