user
Instruction
Answer the question based on the provided table.


Table
Table Title: 'Fleet' regarding 'Air Ceylon'
Table Content:
| Aircraft | Introduced | Retired |
| --- | --- | --- |
| Aérospatiale N 262 | 1967 | 1969 |
| Boeing 707 | - | - |
| Boeing 720 | 1976 | 1977 |
| Convair 990 Coronado | 1974 | 1975 |
| de Havilland Comet | 1962 | 1965 |
| Douglas DC-3 | 1947 | 1976 |
| Douglas DC-4 | 1949 | 1953 |
| Douglas DC-8 | 1972 | 1978 |
| Hawker Siddeley HS 748 | 1964 | 1979 |
| Hawker Siddeley Trident | 1969 | 1979 |
| Lockheed Constellation | 1956 | 1958 |
| Lockheed Super Constellation | 1958 | 1960 |
| Lockheed L-188 Electra | 1960 | 1961 |
| Sud Aviation Caravelle | - | - |
| Vickers VC10 | 1965/1977 | 1971/1978 |


Question
What Hawker planes has Air Ceylon had?


Answer Format
The final answer should be a sentence and use the following format:
```json
{
    "answer": "your_generated_sentence_here"
}
```
rule
["Air Ceylon had Hawker Siddeley HS 748 and Hawker Siddeley Trident."]