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 | Winners | Grand Finalist | Scores | Venue | Crowd | Margin | Season Result |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1977.0 | Hawthorn | Carlton | 14.11 (95) – 11.5 (71) | Waverley Park | 27407.0 | 24.0 | Preliminary Finalist |
| 1978.0 | Fitzroy | North Melbourne | 13.18 (96) – 2.8 (20) | Waverley Park | 26420.0 | 76.0 | 9th |
| 1979.0 | Collingwood | Hawthorn | 12.8 (80) – 7.10 (52) | Waverley Park | 37753.0 | 28.0 | Grand Finalist |
| 1980.0 | North Melbourne | Collingwood | 8.9 (57) – 7.12 (54) | Waverley Park | 50478.0 | 3.0 | Elimination Finalist |
| 1981.0 | Essendon | Carlton | 9.11 (65) – 6.5 (41) | Waverley Park | 42269.0 | 24.0 | Elimination Finalist |
| 1982.0 | Sydney Swans | North Melbourne | 13.12 (90) – 8.10 (58) | Waverley Park | 20028.0 | 32.0 | 7th |
| 1983.0 | Carlton | Richmond | 14.16 (100) – 10.6 (66) | Waverley Park | 32927.0 | 34.0 | Elimination Finalist |
| 1984.0 | Essendon | Sydney Swans | 13.11 (89) – 5.8 (38) | Waverley Park | 30824.0 | 51.0 | Premier |
| 1985.0 | Hawthorn | Essendon | 11.11 (77) – 10.8 (68) | Waverley Park | 24812.0 | 9.0 | Grand Finalist |
| 1986.0 | Hawthorn | Carlton | 9.12 (66) – 5.6 (36) | Waverley Park | 19627.0 | 30.0 | Premier |
| 1987.0 | Melbourne | Essendon | 8.10 (58) – 8.6 (54) | Waverley Park | 26860.0 | 4.0 | Preliminary Finalist |
Question:
What grand finalist had a year after 1979, a margin smaller than 30, and winners of essendon?
Answer:
Carlton