user
Instruction
Answer the question based on the provided table.


Table
Table Title: 'International competitions' regarding 'Kipsubai Koskei'
Table Content:
| Year | Competition | Venue | Position | Event | Notes |
| --- | --- | --- | --- | --- | --- |
| 1977 | East and Central African Championships | Mogadishu, Somalia | 1st | 1500 m | 3:41.6 |
| 1982 | World Cross Country Championships | Rome, Italy | 15th | Senior race | 34:35.1 |
| 1982 | World Cross Country Championships | Rome, Italy | 4th | Senior team | 271 pts |
| 1984 | African Championships | Rabat, Morocco | 3rd | 5000 m | 13:42.05 |
| 1984 | African Championships | Rabat, Morocco | 1st | 10,000 m | 28:11.70 CR |
| 1984 | East and Central African Championships | Nairobi, Kenya | 1st | 5000 m | 13:50.3 |
| 1985 | East and Central African Championships | Cairo, Egypt | 1st | 10,000 m | 28:48.36 |
| 1985 | African Championships | Cairo, Egypt | 2nd | 10,000 m | 28:26.63 |
| 1986 | World Cross Country Championships | Colombier, Switzerland | 7th | Senior race | 35:54.8 |
| 1986 | World Cross Country Championships | Colombier, Switzerland | 1st | Senior team | 45 pts |
| 1986 | East and Central African Championships | Nairobi, Kenya | 1st | 10,000 m | 28:59.1 |
| 1988 | World Cross Country Championships | Auckland, New Zealand | 3rd | Senior race | 35:07 |
| 1988 | World Cross Country Championships | Auckland, New Zealand | 1st | Senior team | 23 pts |


Question
Did Kipsubai Koskei win a medal at any events in the African Championships, and if so what was his time and was it record-breaking?


Answer Format
The final answer should be a sentence and use the following format:
```json
{
    "answer": "your_generated_sentence_here"
}
```
rule
["Kipsubai Koskei got a gold medal in the 10,000 metres at the African Championships, which he won in a championship record time of 28:11.70 minutes."]